Dietary supplements are a category of products used to supplement nutrients or bioactive components that may be lacking in the daily diet and cannot replace normal meals. They are made from ingredients such as vitamins, minerals, extracts from animals and plants, amino acids, dietary fiber, etc., some of which are derived from natural species, while others are prepared through chemical or biotechnological processes. Common types include vitamin supplements such as vitamin A, C, D, mineral supplements such as calcium, iron, zinc, as well as protein supplements, probiotics, dietary fiber, etc. In terms of specifications, they come in various forms, for example, vitamin B1 tablets are commonly available in 5mg, 10mg; vitamin C effervescent tablets come in 500mg, 1000mg; protein powders are commonly available in 300g, 500g cans or bags; probiotics are often in small 2g packets, etc., to meet the needs of different people and scenarios.
