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Vitamin · in-depth review

Vitamin C (Ascorbic Acid)

Vitamin C (Ascorbic Acid)

Ascorbic acid is the cofactor for hydroxylation of collagen proline and lysine, and it reduces plant iron to absorbable ferrous iron; citrus, sweet peppers, and kiwifruit are high in it.

Also known asAscorbic Acid

Marked asPrimarySupporting

Primary

Promotes collagen formation

Proline and lysine on collagen chains need ascorbic acid to be hydroxylated before the triple helix is stable. Skin, gums, vessel walls, and wound healing all depend on this step. Sweet peppers, citrus, kiwifruit, and broccoli are food sources; people whose gums bleed easily and whose wounds close slowly should first check whether the vitamin C plate has been empty for a long time.

Primary

Helps absorption of plant iron

Non-heme iron is absorbed in the duodenum in the ferrous form; ascorbic acid reduces it from the ferric state and forms a soluble complex. Beans and spinach eaten in the same meal as kiwifruit or sweet pepper absorb markedly better; for vegetarians or people with heavier menstrual blood loss who eat little meat, putting vitamin C and iron sources in the same meal is more practical.

Primary

Supports immune-cell function

Neutrophils and lymphocytes accumulate ascorbic acid and consume this reducing power during phagocytosis and the oxidative burst. Citrus, sweet peppers, and kiwifruit are food sources; people under heavier mucosal load at seasonal change more often see immune cells' reducing reserve along this antioxidant path.

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Frequent colds

Neutrophils and lymphocytes accumulate ascorbic acid and consume this reducing power during phagocytosis and the oxidative burst. People whose throats itch in cold air and who catch colds often more often notice fewer unwell days after several continuous weeks.

Slow wound healing

Proline and lysine on collagen chains need ascorbic acid to be hydroxylated before the triple helix is stable. People whose small cuts crust slowly and keep splitting more often notice healing speed and a smoother scar surface after several continuous weeks.

Wrinkles

Proline and lysine on collagen chains need ascorbic acid to be hydroxylated before the triple helix is stable. People whose eye-area lines deepen and whose skin loses bounce more often notice firmness and shallower fine lines after several continuous weeks.

Scurvy

Proline and lysine on collagen chains need ascorbic acid to be hydroxylated before the triple helix is stable. People whose gums swell easily, whose wounds heal slowly, and who eat little fresh produce more often notice gum comfort and healing after several continuous weeks.

Iron-deficiency anaemia

Non-heme iron is absorbed in the duodenum in the ferrous form; ascorbic acid reduces it from the ferric state and forms a soluble complex. People who look pale and get short of breath on stairs, already tracking haemoglobin, more often notice spirits and labs after several continuous weeks.

Common cold

Neutrophils and lymphocytes accumulate ascorbic acid and consume this reducing power during phagocytosis and the oxidative burst. People who congest and get a sore throat when seasons change more often notice cold frequency and how long each spell lasts after several continuous weeks.

With foodMay be taken with food; taking it with a meal that includes plant iron can help absorption. Split high doses and take them after meals
Best timeMorning or midday
SolubilityWater-soluble

Split doses can reduce high-dose gastrointestinal discomfort.

General wellness90 mg/day for adult men; 75 mg/day for adult women; smokers add 35 mg/day
Specific needsDoses for deficiency or special uses should be set by a clinician. The adult supplement upper limit is 2,000 mg/day.

How oftenGenerally fine for daily use; the adult supplement upper limit is 2,000 mg/day.

Cautions

People with kidney stones, iron overload, or kidney impairment should ask a clinician first.

High doses may increase stomach upset.

Interactions

  1. Warfarin (very high doses may theoretically affect coagulation monitoring)
  2. Iron (increases non-heme iron absorption)
Common side effects

· Stomach discomfort

· Diarrhea (high doses)

Rare but important

· People prone to calcium oxalate kidney stones may have higher risk.

Long-term dependenceDoes not cause addiction or typical tolerance.

Sources

These are institution pages you can check—not a certification of this ingredient.

Medical disclaimerThis page is compiled by the HerbBB editorial team for general health information only. It is not a substitute for advice from a doctor, pharmacist, or other qualified clinician. If you have a health condition, take medicines, or are pregnant or breastfeeding, speak with a professional first.