Natural vitamins in Nature Hall are beauty supplements, but they can't really supplement vitamins, improve metabolism and sleep problems you mentioned. If you really want to supplement vitamins, I suggest you go to the drugstore to buy vitamin tablets, which are better absorbed and have no side effects. They are natural vitamins.

If you want to improve the quality of sleep, I'll give you some suggestions:

Drink a bowl of warm millet porridge or milk+oatmeal before going to bed at night, because this kind of food will have a calming effect, which can calm your cerebral cortex and cause drowsiness. Naturally, you want to sleep. If you are afraid of eating too much, you can reduce the amount or warm a glass of milk directly before going to bed, and the effect is the same.