Vitamin C

There is no vitamin C posture rule. The advice was written in 1986 about four other drugs. Here is where it came from and the part worth keeping.

No vitamin C has been shown to treat constipation - a 2023 review found zero trials. What the loosening effect really is, and what works instead.

500 mg a day is the most-studied vitamin C dose in the research. What 27,800 trial participants showed, and why absorption matters at this dose.

No major health authority says to take vitamin C on an empty stomach. Here is what the evidence actually shows, and what matters far more.

Can I drink water after taking vitamin C tablets? Yes — and a full glass beats a sip. What water does and doesn't change, plus the two real exceptions. 

What medications cannot be taken with vitamin C? The NIH gives two examples, one warning on the standard list runs the other way, and lab tests matter more.

What happens if you take vitamin C and you don't need it? Mostly nothing — you excrete the surplus. Fewer than 3% of Canadian adults are deficient.

Should I stop taking vitamin C if my pee is bright yellow? Usually no — and the colour is probably riboflavin, not vitamin C. What each shade means. 

Is too much vitamin C hard on your kidneys? Below the 2,000mg upper limit, rarely. The stone risk, who it affects, and why the mechanism is oxalate.

Does liposomal have side effects? The phospholipid carrier has a long safety record, but the toxicology of high-absorption formats is barely studied.

Should a 70 year old woman take vitamin C? Age alone does not raise the requirement — it stays 75mg. What changes after 70, and when the answer becomes yes.

Is 1000mg of liposomal vitamin C too much? It's half the
2,000mg upper limit, the point plasma saturates, and where the kidney stone
signal appears.