Food composition for preventing Alzheimer's disease and protein powder containing food composition

The invention discloses a food composition for preventing Alzheimer's disease. The food composition is prepared from the following components in parts by weight: 10 to 20 parts of garlic extract, 5 to 15 parts of porphyra haitanesis extract and 2 to 8 parts of radix puerariae extract. The invention also provides protein powder containing the food composition; the protein powder is prepared from the following components in parts by weight: 10 to 15 parts of the food composition, 42 to 46 parts of hydrolyzed deep-sea cod collagen, 35 to 40 parts of soybean isolate protein powder, 12 to 18 parts of mung bean flour, 10 to 15 parts of fructus lyciipowder, 5 to 8 parts of water-soluble dietary fibers, 10 to 12 parts of functional polypeptides and 5 to 10 parts of a natural sweetener; the protein powder is prepared by mixing the components and then carrying out nanometer crushing treatment on the mixture. The food composition and the protein powder disclosed by the invention have no toxic or side effect after being