Crossword clues for the word: PROTEINS The word PROTEINS has appeared as an answer to at least 9 crossword clues on different crossword puzzles. Crossword clues for PROTEINS Showing 1 to 9 of 9 results Clue(s) Amino-acids sources Diet sheet group Dietary needs found in beef Institute in Preston playing around with ingredients of milk and cheese Meat, fish, eggs all contain these Milk supply? Nutritional necessities Part of a balanced diet What enzymes are