A Vegan Diet Can Be Unhealthy. Nutrition Mistakes

Summary

Numerous scientific studies have shown just how much of an effect food has on our health.¹ The wrong diet, smoking, drinking alcohol,² and a lack of exercise cause many people — often only after age 60 — to get lifestyle diseases that could have easily been prevented.³ We are drawn to cheap convenience products, but these are harmful and unnecessary. These factors and excess are also causes.

Our book review of Salt Sugar Fat explains why the government has chosen not to get involved.

Most people today eat what we would call a “normal” Western diet. Only a minority follows an alternative diet, with individuals who have either healthy or unhealthy habits.

When it comes to vegetarians, vegans, and raw foodists, the main problem is that many of them eat an unbalanced diet because they don’t know the facts. They often blindly follow a certain diet trend without questioning. Problem areas include vitamin B₁₂, Vitamin D, iodine, the ratio of omega-6 to omega-3 fatty acids, and calcium.

If you don’t eat a balanced omnivorous diet, it is important to get regular check-ups at the doctor’s office in order to identify any areas of poor nutrition. Unfortunately, most physicians have little or no knowledge about nutrition because they have been given the task of healing, not of prevention.

Informed vegans can indeed eat a very healthy diet. However, pregnant and nursing women should take careful note of certain points so that their babies can grow up healthy and strong. Problems are rare.⁴ Physicians should neither be blind followers of a vegan diet nor absolute critics, but instead have obtained the necessary knowledge about nutrition.

Introduction

Too many vegetarians and vegans fall into “diet traps” that don’t become apparent for some time. They follow a trend, a guru, or a book. And they will tell you that they are doing it for at least one of the following three reasons: for animals, for nature, or to stay or get healthy.

Usually, people who switch to a vegan or even raw food diet focus on the enjoyment factor rather than on the value the food has for their body. This fact is reflected in the focus of vegan (cookbooks). The Foundation Diet and Health Switzerland (diet-health.info) can attest to this fact as it has reviewed (up to 2020) more than 70 such cookbooks since 2015. You may know that a person can be a hard-core smoker or alcoholic for many years without noticing much change in their body. A person often feels just fine for a long time and then when they realize that something is wrong, it’s too late — the body can no longer heal itself.

It’s just the same with diet. Many people blindly follow a trend and don’t consider whether or not it is causing them more harm or benefit. They might feel drawn to information that promotes a certain type of diet.

What are the potential risks?

Well, for example, it would be potentially dangerous to follow the 80/10/10 diet developed by Dr. Douglas N. Graham (chiropractor) as people have died as a result of following his fasting advice.^6,7 However, with the right understanding of fats and proteins, you will be able to eat a healthy diet. One good habit (with about 81/10/09) to start with would be to eat Erb Muesli, a breakfast that covers the daily requirement for the essential fatty acid alpha-linolenic acid (ALA).

There are also other poor variations, for example, 90/5/5, which is one variation of a low-fat raw vegan diet (LFRV). Wikipedia discusses this diet in the entry Raw veganism, which is not entirely correct.

It can also be risky, for example, to be a fruitarian for too long. Young people may enthusiastically follow a fruitarian diet for a longer period of time and combine this with a high level of physical exercise. However, this can be dangerous. See the Wikipedia article on fruitarianism.

The raw food movement has other hidden dangers, but it also holds the possibility of more success than any other type of diet. Raw foodism is highly controversial as even this type of diet can cause people to eat in an unhealthy way. An unbalanced diet and intake of nutrients is often the problem.⁸

Other mistakes that people make include consuming oils and certain nuts that have a poor omega-6 to omega-3 ratio. The importance of this ratio was first discovered and widely discussed in the US.

© CC-by 2.0, Albert CM, 2002, Foundation Diet Health Switzerland

What is a healthy diet?

A healthy diet in the long term includes a variety of vegetables, fruits, seeds, nuts, and algae and takes into account certain factors for specific foods (recipe ingredients) that are discussed on the website diet-health.info. It would be simpler to achieve a healthy diet by eating insects or fish, at least in cases where the conversion of ALA to EPA and DHA (EPA and DHA links in German only) is not functioning properly. Just as with all types of diets, there are several points to be aware of here that we will explain below.

Nutrition mistakes vegans make

Going beyond the norms (social norms) is more difficult as there is usually a lack of set guidelines. Young people are often swept along by trends that don’t receive any criticism. Such trends can cause us to eat unbalanced diets and have deficiencies that don’t necessarily have to be apparent. We can also end up consuming too much of certain essential substances. What are the critical nutrients? How can we determine if we have a deficiency or a dangerous excess of certain nutrients? Is it easier to eat a healthy diet as a vegan or as an omnivore? The critical nutrients are listed below in order of importance.

1. Vitamin B₁₂ — the classic problem
2. Vitamin D — a problem for “everyone”
3. Iodine — vegan sources
4. Omega-6 fatty acids in relationship to omega-3
5. Calcium

What aspects of our diet should we all be aware of?

There are many good reasons to cut out animal products, but we shouldn’t take too narrow of a view.

In general, we should focus on eating a variety of unprocessed, natural foods that are rich in nutrients (whole foods diet). We might think that as long as we consume vegetables, fruits, lentils, some grains and rice, nuts, seeds, and water that we will be healthy. That is true, but only if we make sure that we are eating a balanced diet. No matter if you eat meat or not, if you don’t pay attention to the points below it is very easy to end up having a deficiency that while you don’t notice it, it can shorten your life span.

Whether or not you eat meat or not, it is best to get certain parameters checked by having regular blood tests and urine analyses done. You should do this when you begin to change your diet and again a year later to provide a base comparison — the results will determine how often you should get certain values checked thereafter.

Most people pay more attention to the enjoyment factor and not to how the foods they eat can promote their health. It is said, for example, that it takes about three months to get used to less salt and to develop a preference for foods with lower salt content.

1. Vitamin B₁₂ — the classic problem

Not everyone is aware of the fact that meat-eaters can also develop a vitamin-B₁₂ (in German only) or cobalamin deficiency. The risk of this happening is especially high for older people. There is a good reason why our body has an amazingly well-organized storage system. We can get by even if we only consume very small amounts of B₁₂ at each meal. Our body can only absorb about 1 to 2 µg from the food we eat at a meal, but we only need 2 to 3 µg per day. In addition, our bodies store a supply that will last for three to five years.

Nevertheless, vitamin B₁₂ or cobalamin deficiencies in the body are frequent and often go undetected. Vegans consume a lot of vitamin B₆, and this can cover up a vitamin-B₁₂ deficiency. “Vitamin B₁₂” is actually a coenzyme (cofactor) and not a vitamin. A study conducted in 2010 showed that 52 % of vegans with less than 118 pmol/l have a deficiency in vitamin B₁₂.¹⁵

If you have even a moderate deficiency, your body will suffer. A deficiency can cause weakness and even shorten our lives, without us even noticing. It usually takes several years until problems begin to manifest. But in the case of pregnancy and breastfeeding, having irregular levels can be tragic. Cobalamin is responsible for cell division, blood formation, and a functioning nervous system. Over the long term, a deficiency can cause dementia and neuropathies.

Certain bacteria produce vitamin B₁₂, a vitamin that contains cobalt as a central atom. This also occurs in our large intestine. But unfortunately, we can’t absorb vitamin B₁₂ here even if we eat meat regularly. We need an intact production of the glycoprotein “intrinsic factor,” which acts as a transporter, as well as a properly functioning small intestine. In the small intestine, it is the terminal ileum (final section) that can absorb vitamin B₁₂.

Plant-eating mammals solve this problem in an entirely different way. For example, rabbits have bacteria in their cecum that produce the essential vitamin B₁₂. They then eat the caecal pellets directly from the anus (see cecotrophy)_.¹⁶ Coprophagia is a similar behavior exhibited by rodents, dogs, and other animals. Gorillas and bonobos also eat some feces and soil.¹⁷ Cows consume these bacteria via grass that naturally sometimes also contains fertilizer.

In earlier times, we didn’t have the same type of hygiene that we do today when it came to the drinking water and soil on vegetables — and in this way we got enough B₁₂. A number of followers of Jainism have lived vegan from generation to generation for over 2500 years and they even do so without “killing” plants. They are one of the most economically successful groups in India because they were never able to be farmers and therefore had to follow other career paths.¹⁸

Vegans, vegetarians, and all older individuals need to take special measures to make sure that they are getting enough vitamin B₁₂ (in German only). Vitamin B₁₂ is available as a number of different types of cobalamin. For some time, it was thought that certain plants and the bacterium spirulina contained vitamin B₁₂, but it was then discovered that these were only analogs. Spirulina maxima contain the pseudovitamin B₁₂, which contains the same receptors but doesn’t have the same effect as vitamin B₁₂. In fact, the pseudovitamin can even be harmful.

Fermented vegetables; some types of algae; legumes such as peas, beans, and lupine; and Zingiberales such as ginger contain a very small amount of vitamin B₁₂.¹⁹

About 1 to 3 % of the dietary cobalamin enters the bloodstream without first binding to IF via an unspecified mechanism via the gastrointestinal tract or the oral mucous membranes. If large quantities are consumed orally, this passive cobalamin absorption becomes increasingly important.²⁰

We can prevent a deficiency by taking cobalamin daily, for example, in the form of a lozenge, tablet, or spray. One milligram per day is sufficient. Alternatively, you can get an injection of 1 ml of cobalamin every four to six months, if possible, it should contain the biologically active form adenosylcobalamin (AdoCbl or extrinsic factor) or methylcobalamin and not cyanocobalamin. The latter type of cobalamin has a lower half-life period in the body and has to be converted to other forms, which causes the body to excrete very small amounts of hydrocyanic acid. Instead of taking cobalamin daily, I give myself an injection in the stomach area using a dental needle with a diameter of 0.4 mm, instead of a 0.8, 0.9, or even 1.2 mm needle, which I only use to draw fluid into the syringe.

The best way to determine a deficiency is to have the homocysteine concentration in the blood checked. Elevated levels indicate a B₁₂ deficiency and/or a folic acid deficiency. Checking the vitamin B₁₂ levels in the blood is more inexpensive, but the results are not as accurate. If you suspect a deficiency, you can also have the levels of methylmalonic acid (MMA) in your urine checked. The methylmalonic acid urine test is a reliable indicator of a B₁₂ deficiency. The concentration of MMA is measured in comparison with the concentration of creatine so as to account for any variation in the excretion capacity of the kidneys. In addition, the concentration of holo-transcobalamin in the blood serum is also a reliable marker. The Schilling Test or deoxyuridine suppression test (DUST) is only used to determine the cause of a B₁₂ deficiency when the cause is not a diet.

2. Vitamin D — a problem for everyone?

In temperate climate zones, everyone needs to give special attention to this problem. We can only absorb a portion of the vitamin D (in German only) we need from the foods we eat, and we, therefore, need to spend time in the sun. However, after about 20 minutes of exposure to UVB radiation without wearing sunscreen, the production of vitamin D stops.

We can also get enough vitamin D in winter if we spend time in the sun at elevations of 1500 meters or higher. Below this elevation, the angle of incidence is such that there is too much air mass between the sun and ourselves and the body can’t produce vitamin D. The half-life period of our reserves is about three weeks.

The dermatologist Dr. Richard Weller explains in this TED Talk why it is important to have exposure to a certain amount of sunlight. UVA lowers blood pressure and therefore helps ward off cardiovascular diseases while UVB provides us with the vitamin D we need. The study shows that people die a hundred times more often from cardiovascular diseases than from skin cancer.

It is important to have a good balance of UV radiation — and to know that neither tablets nor diet can truly solve the problem of a vitamin D deficiency. See also the original study in the Oxford Academic European Heart Journal.²¹

This link contains ingredients and recipes that contain high levels of vitamin D. Mushrooms and avocados (DEBInet 3.43 µg/100 g), in particular, can provide significant levels of this vitamin. We consume 10 to 20 % of the daily requirement of vitamin D via diet. The WHO (2004) recommends that children and adults up to 50 years old consume 5 µg/day, adults between 51 and 65 then 10 µg/day, and over 65 then 15 µg/day.

Blood tests measure the concentration of 25-OH-Vitamin D₃ in the blood — a drop of blood from the finger can be used as a blood sample or a nurse or physician can draw blood intravenously. Measuring the levels of 1,25-Dihydroxy-Vitamin-D is not a good way to get an accurate reading of vitamin D present in the body. There are test kits that you can use at home for this and then send back to a laboratory. In Switzerland, we get the results back within two days. But these tests are controversial.

Vitamin D producers recommend that you have a value between 35 and 60 ng/mL, which corresponds to 87 to 150 nmol/L. But levels of 88 ng/mL and higher lead to an increased risk of mortality. In observational studies, 25(OH)D levels between 60 and 100 nmol/L (24–40 ng/mL) are associated with the lowest risk of mortality.

3. Iodine — vegan sources

Iodine is necessary for the synthesis of “thyrox...” (T₄) and “triiodthyron...” (T₃). Most countries have taken specific measures in order to make sure that the population can get enough iodine by eating a standard diet. Iodine is usually added to table salt and as such is present in many processed foods. The US RDS has set the recommended daily allowance for iodine at 150 µg (200 µg for pregnant women). The recommended maximum daily amount is 500 µg, but iodine is only toxic at levels twice this amount.

Individuals who eat a natural foods diet do need to pay particular attention to iodine.

See this text on the brown alga bladderwrack. One gram of bladderwrack contains 3000 µg, which is equal to 3 mg or ten times the daily requirement for iodine. The iodine content can be reduced by over 95% if the algae are soaked (and water changed out) and/or cooked for several hours. In contrast, the brown alga wakame supplies acceptable amounts ranging from 4200 to 10'000 µg/100 g. This number might seem high, but most people eat wakame only occasionally and then in smaller amounts. In contrast, red algae such as nori sheets contain only about 300 µg/100 g.

Since our body stores between 10'000 and 20'000 µg (enough for a year), you can easily maintain the required levels of iodine by eating some wakame every month. Wakame looks like it is raw, but it isn’t. Once you understand the basics about iodine, it really isn’t a problem because the body can store large amounts and the tolerance levels are much wider than with other nutrients.

In the collapsible text, you can see how much iodine the most common sources of this nutrient contain. These include brown algae, spirulina, and rot algae seaweed. Based on these values, you can make a plan that works for you to make sure you are occasionally eating foods that contain enough iodine. There are also other foods that contain at least traces of iodine. However, regulatory authorities don’t require food companies to label this, and the information is therefore usually not included.

It is important to make sure that your total monthly iodine consumption does not exceed 20'000 µg (20 mg). Stiftung Warentest (German consumer organization) warns that this can happen if you eat Assi Brand Drier Seaweed (not dried), Eaglobe Seaweed Sheets, or Eaglobe Dried Seaweed.²² The organization advises against consuming these products. However, this warning doesn’t apply to Japanese who genetically have a much higher tolerance limit.

With sufficient supply, excretion via urine should be more than 75 µg iodine per gram of creatinine.^23,24

4. Omega-6 in relationship to omega-3

It wasn’t until around the year 2000 that scientists discovered that vegetarians, vegans, and raw foodists generally have a poorer ratio of these two essential fatty acids as compared to omnivores. Linoleic acid (LA), an essential omega-6 fatty acid, and alpha-linolenic acid (ALA), an essential omega-3 fatty acid, should ideally be in a ratio of 1:1. Simply put, after the body converts the two essential acids, LA tends to promote inflammation and ALA to prevent inflammation. In the mid-twentieth century in Japan, there was still an average ratio of 2:1. But in the industrial countries, we are happy to have a ratio of 4:1 or 5:1 instead of around 10:1 or higher.^25,26

Information about this topic is found primarily in the US because the level of suffering and poor health is higher there than in Europe. Dr. Michael Klaper, a prominent physician from the US, explains the problem in a YouTube video. He debunks the myth that a Mediterranean Diet is a healthy choice.

Dr. Michael Greger, another leading physician, gets to the heart of the issue and describes the situation in a very transparent manner. Although he is advocating that we eat an oil-free diet, his high voice and unusual gestures, unfortunately, distract from the issue at hand. His talk was recorded in 2003 — since then, not much has changed!

As necessary, our body transforms ALA, the only essential omega-3 fatty acid, into eicosapentaenoic acid (EPA) and then when needed further into docosahexaenoic acid (DHA) (in German only). Both of these nonessential long-chain omega-3 fatty acids are found in fatty fish.

Vegans, vegetarians, and plant-based raw foodists can get the daily recommended allowance for the essential omega-3 fatty acid ALA and work toward achieving the ratio of 1:1 by starting their day with Erb Muesli. This special muesli also has other positive effects — see the nutritional information in the tables below the recipe.

The following books written by physicians in the US recommend completely cutting out oil from your diet:

• Dr. John A. McDougall: The Starch Solution: Eat the Foods You Love, Regain Your Health, and Lose the Weight for Good!
• Dr. Michael Klaper: Pregnancy, Children, and the Vegan Diet
• Dr. Caldwell B. Esselstyn: Prevent and Reverse Heart Disease: The Revolutionary, Scientifically Proven, Nutrition-Based Cure
• Dr. Michael Greger: How Not to Die: Discover the Foods Scientifically Proven to Prevent and Reverse Disease
• Dr. Joel Fuhrman: The End of Dieting: How to Live for Life

There are certainly other physicians who recommend cutting out oil, but I felt that this list was representative and did not include additional sources. Another interesting book that covers the subject of oil is Dr. Neal D. Barnard’s Power Foods for the Brain: An Effective 3-Step Plan to Protect Your Mind and Strengthen Your Memory.

Even raw foodists are misled when it comes to oils and without realizing it the oils they consume can shorten their life span and cause inflammations such as coronary artery disease (CAD). In this respect, many raw foodists, vegans, and vegetarians are eating an unhealthier diet than omnivores, and on average they have alarming ratios of omega-6 to omega-3 fatty acids (e.g., from 17:1 to 24:1).

Long-term effects include inflammations and pain, “thick” blood, higher blood pressure, less stability with blood glucose, more triglycerides and LDL cholesterol, more allergies, rheumatoid arthritis, dementia (incl. Alzheimer’s), digestive problems, depression, and others.²⁷

Nothing has only advantages or disadvantages. And the food industry understands the power of presenting studies — although these are normally one-sided and naturally put oil in a good light.

Very few oils have a good ratio of omega-6 to omega-3 with the exception of flaxseed oil (1:3.7) and canola oil (approx. 2:1). Walnut oil (5:1) is on the border whereas olive oil (11.5:1) has a poorer ratio and is consumed in large quantities. According to studies (see link), the greatest successes for absolute risk reduction (ARR) can be achieved by making sure that 20 % or less of the total calories consumed are from fat.

In general, we know that for technical reasons processed foods have a poor ratio of omega-6 to omega-3 that can be detrimental to our health. A keyword here is trans fat.²⁸

5. Calcium

The dairy industry makes sure that the daily recommended allowance for calcium (in German only) is generously calculated (e.g., reference values for German, Austria, and Switzerland range from 1000 mg to 1.2 g per day whereas the NHS in England lists 700 mg). There are very good reasons for this lower value.²⁹

It is interesting to note that in non-milk-drinking countries the WHO recommends 400–500 mg/day of calcium and in milk-drinking countries 900–1500 mg/day. All recommendations take into account that we can only absorb 20 to 40 % of the calcium we consume. However, if enough vitamin D is present then we are able to absorb a higher percentage.

Consuming too much protein (phosphates) is the main reason for calcium loss. This is primarily the case with dairy products, meat, and eggs, These contain high levels of sulfur-containing amino acids (amino acid metabolism) and sodium, which cause large amounts of calcium to be lost. The Federal Supreme Court of Switzerland accordingly ruled in 2001 that the dairy industry may no longer use the slogans “Milch macht starke Knochen” or “Milch gibt starke Knochen” (Milk makes/gives us strong bones) and that the industry may no longer claim that the calcium contained in milk is effective in the fight against osteoporosis.³⁰

The market for food additives is unfortunately very lucrative, which is why companies in the food industry produce scientific studies and invest huge amounts of money in marketing. The dangers then remain hidden as this unbiased study from May 2017 shows.³¹

Countries that consume only small amounts of milk and dairy products have a much lower incidence of osteoporosis — and the reverse also holds true.

Practically all natural spices contain high levels of calcium, usually more than 1 % of their weight (e.g., dried basil contains 2.2 g/100 g); however, we generally only consume spices in small amounts. In addition, poppy seeds contain 1438 mg, sesame seeds 780 mg to 1 g, chia seeds 630 mg, and mustard and nettles 500 g. Almonds and flaxseed contain 250 mg. Soybeans, a number of leafy greens, nutmeg, garlic, and beans come in at 200 g, amaranth contains 500 g, and kale, wakame, turmeric, and arugula provide 150 mg. Somewhat lower levels are found in cocoa beans, wasabi, watercress, spirulina, hazelnuts — and finally in milk.

Peanuts, pistachios, broccoli, pak choi, chicory, fennel, walnuts, borage, chives, and macadamia nuts contain 100 mg/100 g. And a number of vegetables, nuts, and seeds provide about half this amount. As a result of the oxalic acid contained in rhubarb, Swiss chard, and spinach, we can only absorb a little of the high amounts of calcium they contain.

The values above show that vegans who eat a balanced whole foods diet can easily get enough calcium by eating vegetables, spices, herbs, nuts, and seeds. In addition, these foods are mostly alkaline and the calcium can be easily stored instead of being pulled out of the bones, which is what happens in the case of dairy products.

You can also ensure that you get enough calcium by drinking mineral water that contains high levels of this important nutrient. The table below shows the amount of calcium contained in 100 ml. Theoretically, you could cover the daily recommended allowance for calcium by drinking 2 liters of mineral water. However, you would have to pay careful attention to the amount that different brands contain — this can range from 1 mg/100 ml to more than 60 mg/100 ml.

Tab drinking water (soft natural drinking water without adding) as an example: Meggen from mountain source has 41.3 mg/l (ie 4.1 mg/100ml) of calcium at pH 7.93. This is 12 times less than selected mineral water. At least in Switzerland (see this map) the drinking water varies greatly, from about 0.2 mg/100ml to 15 mg/100ml depending on the city. With a few exceptions like Schaan of 41 mg/100ml. Also, pay attention to the magnesium content.

We can assume that individuals who do not consume milk and dairy products have a lower daily requirement and that the necessary amount in the bloodstream is lower for vegans than omnivores. In fact, bone brittleness only occurs if less than 600 mg/day of calcium is consumed over a longer period of time.³³

It is, of course, important to make sure that small children are consuming good natural sources of calcium.

A 24-hour urine test can show you the current state of your calcium intake. Normally, there is between 100 and 300 mg/day of calcium in urine samples collected over a period of 24 hours. A blood test can provide the same information. Normal calcium levels range from between 8.5 and 10.2 mg/dL.

No worries

Vegans who eat a balanced whole foods diet have no problem getting enough zinc. This is also true for riboflavin (vitamin B₂), niacin (vitamin B₃), and pantothenic acid (vitamin B₅). And it is strange to see texts that list folic acid (vitamins B₉ and B₁₁) as problematic because vegans who eat a healthy diet tend to get this nutrient in excess.

A healthy vegan diet also provides more than enough of the essential amino acids — with the exception of methionine, for which the necessary amount is usually just met. However, vegans get enough L-cysteine, which the body can then use to produce methionine. Sunflower seeds, walnuts, and lentils are good sources of essential amino acids.

It is interesting to note that you will have no problem meeting the recommended daily allowance for iron (links in this section in German only) if you eat the vegan recipes found on the website diet-health.info. This website is unique in that it provides nutritional information on the essential nutrients for almost every ingredient.

Life expectancy and future

Thanks to major medical advances since the end of the Second World War, we have been able to steadily increase our life expectancy. This has occurred even though the modern diet and lifestyle habits most of us have are quite poor.³⁴ The result is an ever-increasing number of people with poor health and significant limitations instead of individuals who are enjoying good health in old age.

Eating excess protein in the form of meat and grains is one of the main causes of civilization diseases and obesity. We would rather hear the hopeful prognoses for increasing life expectancy than to reflect upon the causes that are leading our affluent society into a state of degeneration.

It would be much better to focus on recommendations as to how we can really eat a healthy diet — even as vegans. Or especially as vegans? There is probably no other subject that we hear more differing views on than health and diet. And this has good reasons. In brief salt, sugar, and fat can be used to create best-selling products that meet our “bliss point.” This is the point when palatability is at its highest and we crave more, which occurs in the amygdala in the core of our brain. Our brain connects results with emotions and then releases endorphins called opioid peptides, which work in the same way as opiates.

The agriculture and food industry has the money and power to tempt us day in and day out with such products. These industries also have a great influence on politics. And for the media, the revenues from advertising are very important. Doctors are usually not well informed on the subject of nutrition as this subject is not included in their training. And our family and society also “determine” our health and lifestyle habits.³⁵

Please click below on the “CLICK FOR” button to read a short description of the following extraordinarily successful vegan athletes: Brendan Brazier (runs ultramarathons), Scott Jurek (ran 3489 km on the Appalachian Trail thru-hike in 46½ days), and Patrik Baboumian (set world records for lifting).

You can also find out more about these athletes by watching the documentary “The Game Changers,” a compelling film from 2018 directed by Oscar winner Louie N. Psihoyos. Wikipedia: The film focuses primarily on athletes who used to eat a meat-rich diet to achieve peak performance. These athletes answer the question of how the change to a purely vegan diet affected their performance and their lives ... The film had several executive producers including James Cameron (triple Oscar winner), Jackie Chan, Pamela Anderson, and Novak Đoković. Watch the film to hear numerous top vegan athletes speak about their experience, for example, Arnold Schwarzenegger, Patrik Baboumian, Lewis Hamilton, James Wilks, and Dotsie Bausch.

Omnivores tend to have problems with these five nutrients

As described above, vegans who eat a balanced whole foods diet tend to get enough zinc, riboflavin (vitamin B₂), niacin (vitamin B₃), and pantothenic acid (vitamin B₅). However, this means that vegans who don’t eat a balanced diet are in danger of having deficiencies in the long term. And this is even more true for omnivores. If we consider the foods that are rich in these nutrients, we can understand why omnivores are more likely to be deficient.

• Zinc is found primarily in nuts (walnuts and pecans), legumes (lentils), mushrooms, and yeast.

• Riboflavin (vitamin B₂) is best obtained by eating vegetables such as legumes, broccoli, asparagus, and spinach.
  But yeast, nuts (almonds), mushrooms, and vegetable oils are also good sources of riboflavin. Pregnant women and alcoholics should make sure that they get an average of 1.5 mg of riboflavin per day. The erythrocyte glutathione reductase activation test (EGRAC) can test for riboflavin status. The concentration of riboflavin and FAD correlate with nutritional status.
• Niacin or nicotinic acid (vitamin B₃) is found primarily in peanuts (if possible raw and unsalted), wheat germ, dates, mushrooms, beer yeast, legumes, and dried apricots. However, our body can use the amino acid tryptophan to produce niacin itself — vegans who eat a balanced diet tend to get a lot of tryptophan.
• Pantothenic acid (vitamin B₅) is most notably contained in legumes (lentils), avocados, amaranth, grains (whole grain rice), chicory, and sweet potatoes.
• Folic acid (Folate) used to be called vitamin B₉, vitamin B₁₁, or vitamin M. Most fairly health-conscious vegans eat more than enough yeast, whole grains, legumes, dark leafy greens, and a variety of seeds. All of these are rich in folate. Folic acid deficiency is not a problem for vegans who eat a whole foods diet; it is primarily a concern for omnivores.

You can see here that eating legumes are a good way to get all five of these nutrients. Legumes include beans, peas, peanuts, chickpeas, lentils, sweet peas, soybeans, and lupine.

In 2015, the German nutrition society (Die Deutsche Gesellschaft für Ernährung e. V., DGE) recommended 300 µg of folic acid daily and 550 µg for women who are trying to get pregnant (during the period from before conception to early pregnancy). A deficiency of folic acid or the other nutrients listed above can be determined by measuring the levels of homocysteine in the urine. A histidine metabolic loading test can be used for the diagnosis of a folic acid deficiency. Unfortunately, elevated folic acid levels can cover up a vitamin B₁₂ deficiency.

Iron — especially important for women

Vegans who eat a balanced diet get plenty of iron; in fact, they are much better off than omnivores who eat an unbalanced diet. Our body can absorb the iron found in foods such as leafy greens, red beets, cress, whole grain products, legumes, and nuts. When eaten together with vitamin C (in German only), for example, in bell peppers, cauliflower, broccoli, or a glass of orange juice, the iron in plant-based products can be better absorbed. Thanks to the high amounts of vitamin C that vegans consume, larger amounts of trivalent iron can be converted into divalent forms that are easier to absorb. Omnivores get iron from meat and eggs.