How do vegetarians remain healthy?

how can vegetarians live and be healthy without eating any protein? i mean do they have to drink protein shakes every day or what?and what about people in that peta cult who don't drink milk or eat cheese, how do they get calcium and vitamin d? i mean their muscles and bones must be withering away no wonder they're all pale and skinny. the healthy vegetarians must have to sneak in meat once or twice a day without anybody knowing.

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Vegetables are the supplements which are the rich source of the Vitamins,Minerals and other essential supplements.Green and Leafy vegetables contains fibres which are best for the strong digestive system as well as its bets for the powerful eyes.So your body will get healthy.And your weight can be in very proper manner.

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