By the fast development of molecular biological techniques, more Verm pharmaceuticals and functional components were isolated from earthworms. The hydrolyzed body fluids contain 9.34% protein and 78.73 mg of free amino acids per liter of raw fluid and are rich in vitamins and minerals. Earthworm protein is easily hydrolyzed into free amino acids. The crude fat content of earthworm meal was 7.34%. Their protein content and amino acid composition are better than those of fish meal, cow milk and soybean meal.
Earthworms are rich in protein and various amino acids the protein content of earthworm meal was 54.6–59.4% on dry weight. Because of medicine food homology in China, people have been using earthworms as a food for several centuries. Earthworms have been a traditional medicine in China for at least 2300 years.
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