Vitamin C

Vitamin C interactions with warfarin, statins, chemotherapy, antacids and thyroid medication — what the research shows and when to involve a physician.

Vitamin C iron absorption is real but meal-specific. What the radioisotope data shows, why whole-diet trials disagree, and what moves iron most.

Older adults eat as much vitamin C as younger adults but carry less in their blood. What the research says about vitamin C for seniors and what to do.

Liposomal vitamin C absorbs better than regular vitamin C in nine of ten trials. What the evidence supports, what it does not, and the dose where it matters.

Description: The RDA is 90mg, research points to 200mg, and the safe ceiling is 2,000mg. A practical vitamin C dosage guide — and why absorption changes the maths.

Your body absorbs nearly all of a 200mg vitamin C dose, but under 50% above 1 gram a day. See how absorption and kidney excretion decide what you keep.

Nearly half of US adults have insufficient vitamin C. Discover how liposomal vitamin C improves absorption, supports immunity, and why standard supplements often fall short.