Bell #77 Hair Formula - Helps to rejuvenate your hair for a fuller and thicker appearance with powerful DHT block, the recognized #1 cause of hair loss. With a unique combination of ingredients, this is a superior natural product for stopping hair loss and replenishing thinning hair. Effective for preventing baldness for those with a family history, and is excellent for those on radiation or chemo therapy, or for hair loss caused by thyroid dysfunction.