Can supplementing qi and blood really promote hair growth?

Yes, from the point of view of Chinese medicine, slow hair growth is liver blood deficiency. Hair is also called blood stasis, so liver blood is sufficient, which has a significant effect on hair growth! China's ancient book has long said: hair is blood; Chinese medicine also mentioned that "the kidney is the innate foundation, and its flowers are in the hair", mainly saying that hair is related to human kidney qi and liver blood. Kidney qi is related to hair quality, and liver blood is related to hair length.