The main thing to look for in a vitamin if you are experiencing hair loss or thinning hair is DHT blocking ingredients. Trying to block DHT from the scalp is a key in fighting and reducing hair loss. The next thing you should look for in a hair vitamin is the proper ingredients to help promote blood circulation to the scalp, which in turn aids in promoting hair growth. The final thing to look for is nutrients to help clean away dead hair follicles, and assists in feeding the healthy hair follicles.
Like all cells in the body, hair follicles need the proper nutrients in the proper amounts in order to create the optimal environment for healthy hair growth to occur. For many of these nutrients, the most effective way for them to reach the hair follicle is through the blood stream when taken as a dietary supplement.