C-Flav by Ortho Molecular Products

If your fruit and vegetable intake is light, you bruise easily during training, or you’re prepping for allergy season, vitamin C with quercetin fits. It’s a maintenance-level 400 mg vitamin C with gentle bioflavonoids, not a high-dose repletion plan. Useful if your Plasma Vitamin C is low-normal, if you’re taking iron for low Ferritin (vitamin C improves absorption), or if you want steady immune readiness before travel or winter.

Vitamin C drives collagen formation, the scaffolding for blood vessels, skin, and gums, and recharges other antioxidants in cells. It also improves white blood cell function (the cells that clear microbes). Quercetin, rutin, and citrus bioflavonoids help stabilize mast cells (the cells that release histamine behind sneezing and itching) and support capillary integrity. In practice, steady intake modestly shortens cold duration in physically stressed people and can nudge hs-CRP (a systemic inflammation marker) down in some.

Take one capsule daily with food to reduce stomach upset. Vitamin C is better retained in divided doses, so if you use more elsewhere, spread it through the day. Start 2 to 4 weeks before allergy or cold season for best effect. If your Ferritin is low, pair this with iron to enhance absorption. Visible changes like gum bleeding or easy bruising often improve within 2 to 4 weeks when low vitamin C was part of the problem.

If you have hemochromatosis or consistently high Ferritin, avoid adding vitamin C to iron because it increases iron absorption. A history of calcium oxalate kidney stones warrants caution with total daily vitamin C above routine intakes; 400 mg/day is modest. Oncology patients should clear antioxidants with their care team. Quercetin can affect drug handling in the liver and gut; use caution with cyclosporine, tacrolimus, some calcium-channel blockers, and with anticoagulants due to mild antiplatelet effects.