Vitamin C carries one of the largest sets of EFSA-authorized health claims of any single nutrient — nine separate claims, all under Commission Regulation (EU) 432/2012. That breadth makes it easy to assume vitamin C claims are low-risk across the board. Most are straightforward, but the conditions attached to them are still specific, and one claim in particular requires a dose most “source of vitamin C” products don't meet.
The threshold that unlocks most vitamin C claims
Eight of the nine authorized vitamin C claims share the same condition of use: the food must be at least a “source of vitamin C” as defined in the Annex to Regulation (EC) No 1924/2006.1 That's a nutrition-claim threshold — a defined minimum percentage of the Nutrient Reference Value (NRV) per 100 g, 100 ml, or per portion — not a specific milligram figure attached to the health claim itself. Once a product clears that “source of” bar, it can carry any of the following:1
- Vitamin C contributes to normal collagen formation for the normal function of blood vessels
- Vitamin C contributes to normal collagen formation for the normal function of bones
- Vitamin C contributes to normal collagen formation for the normal function of cartilage
- Vitamin C contributes to normal collagen formation for the normal function of gums
- Vitamin C contributes to normal collagen formation for the normal function of skin
- Vitamin C contributes to normal collagen formation for the normal function of teeth
- Vitamin C contributes to normal energy-yielding metabolism
- Vitamin C contributes to normal functioning of the nervous system
- Vitamin C contributes to normal psychological function
- Vitamin C contributes to the normal function of the immune system
- Vitamin C contributes to the protection of cells from oxidative stress
- Vitamin C contributes to the reduction of tiredness and fatigue
- Vitamin C contributes to the regeneration of the reduced form of vitamin E
- Vitamin C increases iron absorption
Several of these are grouped under a small number of formal Entry IDs in the Register — collagen formation alone spans six separate body-function claims sharing the same “source of” condition.1
The one claim with its own specific dose
One vitamin C claim is different from the rest: “Vitamin C contributes to the maintenance of the normal function of the immune system during and after intense physical exercise.” This claim requires the food to provide a daily intake of 200 mg of vitamin C— well above the general “source of” threshold — and the consumer must be informed that the beneficial effect is obtained with 200 mg daily, in addition to the recommended daily vitamin C intake.1 A product that qualifies as a general “source of vitamin C” does not automatically qualify for this specific claim; the 200 mg condition is its own gate.
Where this most often goes wrong: collagen and beauty positioning
Vitamin C's six collagen-formation claims are genuinely useful for skin, joint, and beauty-adjacent positioning — but they describe vitamin C's role as a cofactor in collagen synthesis, not a claim about collagen itself as an ingredient.2 EFSA has not authorized any direct beauty claim for collagen as a substance, and terms like “anti-aging,” “reduces wrinkles,” or “restores” cross into unauthorized territory regardless of what else is in the formula.2 The compliant path for a beauty-positioned product is to build the claim around an authorized nutrient — vitamin C (collagen formation), zinc, biotin, or selenium — at a dose that meets each nutrient's own condition of use, rather than attributing a skin or anti-aging benefit to collagen peptides directly.
The practical takeaway
Vitamin C's claim set is broad, but “source of vitamin C” and “200 mg of vitamin C” are two different gates unlocking two different sets of claims. A formulation should be checked against the specific condition attached to whichever claim it intends to carry — not against a general sense that “vitamin C claims are fine at any dose.”