Vitamin C

Sustained 1,000mg vitamin C doses blunted mitochondrial gains in trials. What athletes should know about oxidative stress, recovery and race-week timing.

Surgery drops plasma vitamin C by 39% in the first week, and 21% of patients start deficient. What the evidence says about vitamin C wound healing.

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.

The best foods high in vitamin C, how much storage and cooking take
before you eat them, and why 41.8% of US adults still fall short. 

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.

Vitamin C for smokers: why requirements run 35mg higher, why deficiency is 3x more common, and what the evidence says about effective daily intake. 

Vitamin C for colds will not stop you catching one. The trials do show a 26% cut in severe symptoms, plus one group where prevention genuinely works.

Pauling claimed 10g a day. Two Mayo trials found nothing. What high-dose vitamin C really does, and the ceiling oral doses cannot cross.

Vitamin C deficiency symptoms usually start quietly, not with scurvy. See the blood thresholds, who is genuinely at risk, and why scurvy still appears.

Nearly all commercial ascorbic acid begins as corn. What that means if you react to corn, and how to actually verify a corn-free vitamin C claim.

"Liposomal" is an unregulated label claim. How to judge the best liposomal vitamin C on encapsulation efficiency, third-party testing and ingredient source.