what nutrients commonly present a problem in the diets of vegans
Because of population density and religious traditions, India should have the most vegetarians. There is a higher percentage of vegans in Taiwan.
Texas
butterfly
Vegans can do any exercises that non-vegans can do.
It depends - most vegans won't eat refried beans made with lard, but refried beans made with vegetable oils (vegetarian refried beans) are perfectly acceptable to vegans.
Probably beans as vegans need more vegetable sources of protein than do non vegans.
There is no collective noun for 'vegans', in which case, you use a noun that is appropriate for the situation for a group of vegans; how about a crop of vegans.
Regular drinkers are said to most commonly develop some form of alhemiers.
Most Quorn products contain egg.
Most vegans avoid silk, as it comes from an animal.
Most don't. They are just unfertilized animal embryos