Herbal arnica consists of sesquiterpene lactones that may penetrate the skin and block the NF-kb inflammatory pathway. These compounds might also reduce the degradation of collagen in joints and blood vessels. It does so by binding to a specific amino acid (Cys38). Variants on the protein with another amino acid https://roofers-near-braintree45432.blogs100.com/35095947/not-known-factual-statements-about-arnica