Classification
Product TypeIngredient
Product FormBulk vitamin ingredient (powder or oil-based concentrate) for dietary supplement use
Industry PositionDietary supplement and fortified food ingredient
Market
Ergocalciferol (vitamin D2) is used in the United States as a dietary supplement ingredient and as a source of vitamin D on Supplement Facts labels, alongside vitamin D3 products. U.S. oversight for dietary supplements is anchored in DSHEA, with manufacturers responsible for ensuring products are not adulterated or misbranded and for meeting applicable FDA regulations. Labeling conventions in the U.S. require declaring vitamin D amounts in micrograms (with optional IU in parentheses) and expressing % Daily Value based on FDA’s established Daily Value for vitamin D. Quality positioning in the U.S. market often references pharmacopeial standards (e.g., USP–NF monographs for ergocalciferol dosage forms) and voluntary third-party verification programs (e.g., USP Verified; NSF Certified for Sport®) for buyer and consumer assurance.
Market RoleMajor consumer market with significant downstream formulation/packaging; import-reliant supply chain for bulk vitamin ingredients
Domestic RoleDietary supplement ingredient (vitamin D source) used in finished supplement products and some fortified foods
Risks
Regulatory Compliance HighU.S. FDA oversight under DSHEA and implementing regulations can severely disrupt trade if ergocalciferol-containing dietary ingredients or finished supplements are found adulterated or misbranded (e.g., inadequate cGMP controls, insufficient identity/strength verification, or noncompliant labeling), potentially leading to holds, refusals, recalls, and retailer delisting.Operate to 21 CFR Part 111 dietary supplement cGMP, maintain robust identity/strength/purity specifications and records, and verify Supplement Facts compliance (21 CFR 101.36) including correct vitamin D units and %DV calculations.
Labeling & Claims MediumMislabeling risk is elevated because U.S. rules specify how vitamin D must be declared on Supplement Facts (mcg required; IU optional) and %DV must align to FDA’s Daily Value for vitamin D; errors can trigger misbranding exposure.Perform pre-market label verification against 21 CFR 101.36 and FDA Daily Value references; implement label change control and periodic label audits.
Quality MediumPotency/assay nonconformance can create batch rejection and recall risk in U.S. channels; USP–NF monographs for ergocalciferol dosage forms specify content limits (e.g., 100.0% to 120.0% of declared amount) that can be used as a quality benchmark by buyers and verification programs.Use validated assay methods and stability programs aligned to applicable pharmacopeial standards; consider third-party verification where commercially valuable (e.g., USP Verified, NSF programs).
Consumer Safety MediumNIH notes health risks from excessive vitamin D intake; high-dose vitamin D2 supplement positioning can increase downstream consumer safety, complaint, and liability exposure if dosing instructions and warnings are inadequate or if consumers stack multiple vitamin D sources.Implement risk-based labeling and consumer-use guidance consistent with intended population and dose; strengthen post-market complaint handling under Part 111 requirements and monitor adverse event signals.
Sustainability- Vegan/animal-free positioning and claim substantiation: NIH notes vitamin D2 is manufactured using UV irradiation of ergosterol in yeast; this can be used to support animal-free sourcing claims in the U.S. when substantiated and consistently documented.
Standards- USP Verified Mark (USP Dietary Supplement Verification Program)
- NSF Certified for Sport® (NSF third-party testing/certification)
FAQ
What Daily Value is used for vitamin D on U.S. Nutrition Facts and Supplement Facts labels?FDA’s reference guide lists the current Daily Value for vitamin D as 20 micrograms (mcg). The % Daily Value shown on Nutrition Facts and Supplement Facts labels for vitamin D is calculated using that 20 mcg Daily Value.
Which U.S. regulations are most important for making and labeling an ergocalciferol (vitamin D2) dietary supplement?For manufacturing and quality systems, dietary supplement cGMP requirements are set out in 21 CFR Part 111. For the Supplement Facts panel and nutrition labeling rules (including vitamin D declaration conventions), 21 CFR 101.36 applies, and FDA’s Daily Value reference is used to calculate % Daily Value.
How is vitamin D2 (ergocalciferol) typically manufactured for dietary supplements?NIH’s Office of Dietary Supplements notes that vitamin D2 is manufactured using UV irradiation of ergosterol in yeast.