Vitamin B6 for Hair Growth: Benefits, Sources, Dosage, and Deficiency Signs Vitamin B6 , also known as pyridoxine , is a vital water-soluble vitamin involved in over 100 enzyme reactions , primarily related to protein metabolism . It plays a key role in brain function , immune health , and the production of hemoglobin , the protein in red blood cells that transports oxygen throughout the body — including to your scalp and hair follicles. Because of its essential functions in protein synthesis , hormonal balance , and scalp nourishment , vitamin B6 is considered one of the most important nutrients for healthy hair growth and preventing hair loss. How Vitamin B6 Supports Hair Health Vitamin B6 influences several biological processes that directly impact hair growth and strength. Here’s how it contributes to healthier, fuller hair: 1. Protein Metabolism: Building Stronger Hair Hair is primarily composed of keratin , a structural protein that requires adequate vitamin B6 for its p...