Both eumelanin and pheomelanin are made from the amino acid tyrosine, using the enzyme tyrosinase. Increased tyrosinase activity increases pigment production and results in a darker hair color.
[Content of salicylic and jasmonic acids in pea roots (Pisum sativum L.) at the initial stage of symbiotic or pathogenic interaction with bacteria of the family Rhizobiaceae]. [The new bacterial ...
Select independently determines what we cover and recommend. When you buy through our links, we may earn a commission. Learn more. Vitamin C, a powerful antioxidant, is a longstanding favorite of ...