👉 Biosterins are small, non-protein molecules that play a critical role in regulating gene expression and cell function. They are produced by living organisms and can be found in various tissues, including the skin, heart, liver, and brain. Biosterins have been shown to have numerous biological functions, including promoting cellular health, reducing inflammation, and modulating immune responses. One example of a biosterin is the biotin (vitamin B12), which is essential for DNA synthesis