Beta-hydroxy-beta-methylbutyric acid (HMB) is widely found in citrus fruits, certain vegetables such as broccoli, legumes such as alfalfa, and certain fish and seafood. Beta-hydroxy-beta-methylbutyric acid (HMB), as a metabolite of leucine, has been shown to increase muscle synthesis, reduce muscle breakdown, and has anti-inflammatory effects. The conversion of HMB into stable β-hydroxy-β-methylbutyrate calcium salt (HMB-CA) has been widely used in sports nutrition and other foods, which can play a special nutritional role:

1, used to promote muscle growth, enhance immunity, reduce the level of cholesterol and low-density lipoprotein (LDL) in the body to reduce the occurrence of coronary heart disease and cardiovascular disease, but also to enhance the human nitrogen fixation ability, maintain protein levels in the body;

2, can be added to beverages, milk and dairy products, cocoa products, chocolate and chocolate products, candy, baked goods, special dietary food, the recommended amount is still ≤3 g/day; 3, the United States Food and Drug Administration GRAS recognition, the scope of use for medical nutrition food and special meals. According to Table 2 and Table 3 of China's "General Rules for Sports Nutrition Food of the National Standard for Food Safety" (GB 24154-2015), 1-3 g/day can be added to sports nutrition products of speed and strength.