Hey there, I'm a pretty strict dietary vegan, so I don't consume any animal-based products including eggs and dairy!
What is the reasoning behind the decision to go vegan?
I was reading a book by Sarah Kramer, a vegan cookbook author from Canada.
Interesting. I don't believe I will ever go Vegan, but it sounds like an interesting take on diets. 
It's not for everyone, since it has to be well planned or you could end up deficient in vitamin B, vitamin D, calcium, iodine, iron, zinc, riboflavin (vitamin B), long-chain fatty acids EPA and DHA, and omega-3 fatty acids.
I would come to believe the difficulty in providing a well balanced Macro diet through veganism can outweigh the positives of it. 
A lot of doctors are on recort d claiming that high animal fat and protein diets, such as the standard American diet, are detrimental to health.
Well, any standard diet without accounting for the individual's nutrient breakdown is detrimental. I would argue that any healthy diet, whether or not high carb or fat, can benefit the user.