The functions of black sesame include: 1. For treating deficiency of liver and kidney and deficiency of essence and blood, black sesame seeds are steamed or fried and ground into powder, and 20-30g of black sesame seeds are taken orally with honey. Or adding Fructus Jujubae and Mel, and making into pill. 2. To treat blood deficiency and body fluid deficiency, or constipation due to intestinal dryness after illness and postpartum, grind black sesame seeds separately and take 20-30 grams orally; Or 20g of black sesame, 0g of angelica sinensis12g, and 0g of cistanche deserticola12g, and decocted in water. Therefore, it is normal to have black sesame seeds in tonifying kidney. I hope it helps you.