VItamin C Ester

Also known as: ascorbic acid, l-ascorbic acid, sodium ascorbate, calcium ascorbate

Water-soluble antioxidant vitamin essential for collagen synthesis, immune function, and iron absorption. Cannot be synthesized by humans and must come from diet or supplementation.

90mgRDARecommended Dietary Allowance — the daily intake sufficient for 97-98% of healthy adults. Set by the National Institutes of Health.

2000mgUpper LimitTolerable Upper Intake Level (UL) — the maximum daily dose unlikely to cause adverse health effects. Exceeding this consistently may increase toxicity risk.

100ProductsNumber of supplements in our database that contain this ingredient.

3Health ClaimsNumber of researched health benefits associated with this ingredient, rated by evidence strength (strong/moderate/weak).

4Side EffectsNumber of documented side effects from clinical literature and adverse event reports.

Health Claims & Evidence

strongSupports immune function

Supports immune cell function. Regular supplementation may modestly reduce cold duration, but does not prevent colds.

3 studies on PubMed

Related studies:Automatically retrieved from PubMed based on keyword matching. Some may not directly address the specific claim above.Enhanced Vitamin C Delivery: A Systematic Literature Review Assessing the Efficacy and Safety of Alternative Supplement Forms in Healthy Adults.Nutrients (2025) · PMID 39861409 Interactions of diet and immunity.Adv Exp Med Biol (1984) · PMID 6388267 Antioxidant protection of propofol and its recycling in erythrocyte membranes.Am J Respir Crit Care Med (2002) · PMID 11779730

strongAntioxidant protection

Potent water-soluble antioxidant that protects cells from oxidative damage.

40 studies on PubMed

Related studies:Automatically retrieved from PubMed based on keyword matching. Some may not directly address the specific claim above.Enhanced Vitamin C Delivery: A Systematic Literature Review Assessing the Efficacy and Safety of Alternative Supplement Forms in Healthy Adults.Nutrients (2025) · PMID 39861409 [Atherosclerosis].Nihon Rinsho (1999) · PMID 10540884 Interaction of vitamins C and E as better cosmeceuticals.Dermatol Ther (2007) · PMID 18045356

strongSupports collagen synthesis

Essential cofactor for enzymes involved in collagen production.

2 studies on PubMed

Related studies:Automatically retrieved from PubMed based on keyword matching. Some may not directly address the specific claim above.Interaction of vitamins C and E as better cosmeceuticals.Dermatol Ther (2007) · PMID 18045356 Chemistry, biochemistry, nutrition, and microbiology of lysinoalanine, lanthionine, and histidinoalanine in food and other proteins.J Agric Food Chem (1999) · PMID 10563973

Known Side Effects

diarrhea at high doses
kidney stones (rare
with chronic high intake)
nausea

Drug Interactions

blood thinners (warfarin)
statins
chemotherapy drugs
estrogens

Always consult your healthcare provider before combining supplements with medications.

Health Claims & Evidence

Known Side Effects

Drug Interactions

Products Containing VItamin C Ester (100)