The Hercules pills sold on the street are said to have been handed down from generation to generation. These secret recipes generally have no scientific basis and no safety guarantee!

I suggest you use some professional products for tonifying kidney and strengthening yang. Tea in 1997 is very useful. I bought it for my friend earlier. I think this means that this tea comes from

Extracted from natural plants. The principle is to use leek seeds to strengthen yang and medlar to warm kidney. It's safer this way I can't remember. Anyway, it is better to use professional kidney-tonifying products, and don't use any secret recipes indiscriminately.