Vitamin C

Does liposomal vitamin C really work? Nine of ten trials show better absorption. Only two measured a health effect. What the evidence does and doesn't.

How long does liposomal vitamin C stay in your system? Hours in your blood, weeks in your tissues. What liposomal delivery changes, and what nobody measured.

What cancels out vitamin C? Nothing does — but copper, iron, heat and rising pH all degrade it, and only the last step is permanent. Here's the chemistry.

Does vitamin C help arthritis? Getting enough matters, but extra has shown little benefit. See the evidence for osteoarthritis, rheumatoid arthritis and gout.

Vitamin C absorption drops below 50% above a gram a day. See what blocks it, why your kidneys clear the surplus, and where liposomal delivery fits.

Do you pee out excess vitamin C? Yes, once your blood is close to full. How much your kidneys keep, what they flush, and what bright yellow pee really means.

Does hot water destroy vitamin C in lemon? Not on contact. Heat speeds a slow loss, but dose is the real limit: about four lemons to meet a man's daily need.

Is vitamin C good for hair growth? It helps if you're low. See what deficiency does to hair, why iron matters more, and what the research hasn't shown. 

Does vitamin C lower cortisol? Not reliably. See what the trials found, where the 2,000 mg daily upper limit sits, and what helps your cortisol more.

What does vitamin C do for you? It builds collagen, stocks immune cells, unlocks plant iron and aids 18 enzymes. What the evidence shows, and what it doesn't. 

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.

Your body cannot finish a collagen fibre without vitamin C. What the evidence supports for skin, joints and tissue repair — and where it stops.