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Protein is an
part of our diet. It helps us to build
. Protein is in food like meat, fish,
products, and eggs. Vegetarians find it in
, nuts, and tofu. Many people eat too
protein. Supermarkets are full of protein-
food. Eating this could shorten our lives. The researcher said
people sit down a lot, so they are more
to eat too much protein. He said this
has "negative health
".