Just don't eat shit and you'll be fine. These are regular (absolutely regular) people at the Russian street:
How many of them are really fat?
P.S. It's funny that at first seconds you can see an ad of "mcdonald's"
In fact all that fast food is made for poor people. If you have a job and earn the money, you will never eat there. In Russia we call them "mac ducks" or a network of free toilets ;)