Vitamins

Vitamin C

Ascorbic Acid

Vitamin C: adult/children 4+ Daily Value reference 90 mg. Confirm the product amount and applicable declaration conditions.

FDA Reference Data

RDI (Adults 4+)

90 mg

Unit

Supplement Facts Declaration

Depends on ingredient and amount

Regulation

21 CFR 101.36

Supplement Facts: declaration depends on the ingredient and amount per serving (21 CFR 101.36). For (b)(2) nutrients, confirmed absent or zero-declarable amounts must be omitted. Missing data is unknown, not zero. Nutrition Facts food-label rules are separate.

Sample Supplement Facts for Vitamin C

Supplement Facts

Serving Size 1 capsule

Servings Per Container 30

Amount Per Serving% Daily Value

Vitamin C90 mg 100%

Ascorbic Acid—

* The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet.

Illustrative sample — format generated by ReguSift per 21 CFR 101.36.

Review a Supplement Facts draft with Vitamin C.

Upload a specification or COA containing declared amounts per serving. AI extracts available values; compare the amount, unit and source form with your document before confirming. This illustrative panel is not evidence of a suitable dose or a compliant finished package.

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About Vitamin C

Vitamin C declaration on Supplement Facts depends on the amount per serving and applicable conditions in 21 CFR 101.36(b)(2). Confirmed absent or amounts below the applicable declaration threshold must be omitted; missing information is unknown, not zero. The adult/children 4+ reference is 90 mg. Select the intended population before calculating %DV. For minerals, use the confirmed elemental amount rather than the whole salt weight. Nutrition Facts follows separate food-label declaration rules.

Common Supplement Forms

Ascorbic Acid

Identity example. Verify the exact form and amount basis against your supplier specification; do not infer effectiveness, dose or conversion from the form name.

Sodium Ascorbate

Identity example. Verify the exact form and amount basis against your supplier specification; do not infer effectiveness, dose or conversion from the form name.

Calcium Ascorbate

Identity example. Verify the exact form and amount basis against your supplier specification; do not infer effectiveness, dose or conversion from the form name.

Liposomal Vitamin C

Identity example. Verify the exact form and amount basis against your supplier specification; do not infer effectiveness, dose or conversion from the form name.

Note: When a salt form is used, the Supplement Facts panel must declare the elemental amount (e.g., “Magnesium 141 mg 34%”), not the salt weight. The salt name appears in the ingredient list below the panel. See %DV calculator for calculation details.

Reference sources and scope

Adult/children 4+ reference values: 21 CFR 101.9(c). Supplement declaration conditions: 21 CFR 101.36(b). Ingredient identity and botanical naming: 21 CFR 101.4. Reference links checked 20 October 2026.

Form names are identity examples. They do not establish product amounts, ingredient permissibility, health effects or a recommended dose. Confirm your exact specification and intended population.

Frequently Asked Questions

What source amount should I use for Vitamin C?

Use your product’s confirmed declared amount per serving, with units and a clear source basis. A raw-material weight is not automatically the finished-product declared amount. Request missing values from the source owner.

What is the adult Daily Value reference for Vitamin C?

The adult/children 4+ reference for Vitamin C is 90 mg. Other populations can have different reference values; confirm the intended population before using this number.

How should missing Vitamin C data be handled?

Missing data remains unknown. Confirm the amount before deciding whether a Supplement Facts row reaches the declaration threshold or must be omitted. Do not fill an unknown amount with zero.

How do I check the form of Vitamin C?

Compare the exact form in the manufacturer’s specification with the source identity and serving declaration. Forms listed here are identity examples, not recommendations or a guarantee of interchangeability. Confirm any conversion using the exact chemical form and supplier assay.