How to Recognize Protein Deficiency. Protein plays a vital role in the daily functioning of our bodies. If you don’t have enough of it, your body will suffer. According to UN data, around 1 billion people worldwide are protein deficient. How do you know if you’re one of them? You’d better watch out for these 10 signs and symptoms related to protein deficiency so you’ll know when there’s a problem. To make things clear, when we say “not enough protein,” we mean somewhere under 56 g for men and 46 g for women per day. For kids, it varies from 19 g to 34 g depending on their age. This figure may also vary if you are pregnant or ill. According to the US Department of Agriculture, you can calculate a more specific amount using a simple formula. Try to eat about 0.36 g of protein for every pound of your weight. 

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