A main point the author addresses is the difference between a healthy vegan diet and a vegan diet based on “potato chips and beer” which most likely will not lead to a positive transformation. Furthermore, these changes may vary depending on each person’s previous diseases and family history.
The main changes mentioned are: a positive transformation on hormonal level, reduced level of inflammation, a change in the gut microbiome (more protective species as opposed to disease-causing organisms), clearing of clogged arteries, stabilization of blood sugar levels, weight loss, better gluten tolerance, increased "insulinsensitivity", a decrease in migraines frequency, a significant drop in cholesterol levels, improvements in mental health, general vitality and improved work productivity.
The author also addresses concerns related to flatulence, the frequency of bowel movements and protein deficiency, which he demonstrates that are completely unfounded.