It can tonify kidney, because kidney stores essence, essence produces marrow, and marrow nourishes bone. So, tonify liver and kidney, invigorate blood and grow bones and muscles.
Drugs for tonifying kidney, Liuwei Dihuang Pill, Jingui Dihuang Pill, Bushen Zhuangjin Decoction or Bushen Huoxue Decoction, etc. Kidney-tonifying foods, such as walnuts, chestnuts, longan, medlar, etc.