Yang Xue Sheng Fa is a famous Chinese Herbal formula that nourishes the blood and kidneys. In Traditional Chinese Medical theory, healthy aging is regulated by the kidneys and hair is nourished by proper blood flow. With that in mind, weakened kidneys or blood may result in hair loss or discoloration. This herbal formula serves to nourish the blood and tonify the kidneys in order to combat hair loss and restore vibrant color. This formula typically needs to be taken regularly for 3-4 months before seeing results. Take 4 capsules, twice daily.