How much does fancl take vitamin C every day? When is the best time to take it every day? How long can you eat for a long time? thank you

I told you, don't use those things. They are all health brands, not quasi-brands. In fact, the best VC is the one-dollar bottle in the pharmacy. The doctor takes those drugs himself. Don't buy a bottle for tens of dollars. It is not worth saying that it is expensive because of repeated chemical synthesis, so the cost is high, but each step of synthesis contains less VC. Might as well take that one-yuan bottle of vitamins. Doctors sometimes prescribe expensive drugs because they are expensive to sell. . . .