The U.S. dietary supplement market attracts manufacturers, distributors, and ingredient suppliers from around the world, but importing these products requires careful attention to FDA requirements. Unlike drugs, dietary supplements generally do not undergo FDA premarket approval. However, imported supplements must comply with applicable provisions of the Federal Food, Drug, and Cosmetic Act (FD&C Act), FDA regulations, labeling requirements, manufacturing standards, and import procedures. FDA can examine products at U.S. ports of entry and may detain or refuse shipments that do not meet applicable requirements. For companies entering the U.S. market, understanding dietary supplement import regulations, FDA dietary supplement compliance, and FDA import requirements is therefore essential. Compliance begins well before a shipment reaches the border and should extend across supplier qualification, product composition, manufacturing controls, labeling, documentation, and post-market oversight.

FDA Requirements for Imported Dietary Supplements

Imported dietary supplements are regulated as foods, but they are subject to requirements specifically applicable to dietary supplements. Facilities that manufacture, process, pack, or hold food for U.S. consumption generally must meet applicable FDA food facility registration requirements. FDA also requires advance notification, or Prior Notice, for covered imported food shipments, including dietary supplements and dietary ingredients, unless an exemption applies. An important point for international manufacturers is that FDA does not generally pre-approve individual dietary supplements, labels, importers, or shipments before importation. Instead, compliance is assessed through regulatory oversight, including examination and inspection at entry. Imported products must meet the same applicable legal requirements as comparable products manufactured domestically.

Manufacturing controls are another critical component of dietary supplement GMP compliance. Under 21 CFR Part 111, companies that manufacture, package, label, or hold dietary supplements must establish and follow current good manufacturing practices designed to ensure product quality and appropriate packaging and labeling. These requirements apply to qualifying foreign firms manufacturing products offered for import into the United States. For companies importing dietary ingredients or supplements, the interaction between dietary supplement CGMP requirements and the broader FDA food safety framework also requires careful evaluation. Depending on the product and activity, additional requirements may apply under FSMA and related regulations. FDA specifically notes that dietary ingredients are not categorically exempt from the preventive-controls framework applicable to human food.

Product Composition, Labeling, and New Dietary Ingredients

Regulatory assessment should begin with the product itself. Importers and manufacturers should verify that each ingredient qualifies for use in a dietary supplement and that the formulation does not create an adulteration concern. Products containing a new dietary ingredient (NDI) may require a premarket notification to FDA at least 75 days before the ingredient or supplement is introduced or delivered for introduction into interstate commerce. The notification must provide the basis for concluding that the product containing the NDI will reasonably be expected to be safe under the recommended conditions of use.The dietary supplement labeling requirements also deserve detailed review. Labels must comply with applicable FDA requirements, including requirements concerning identity, net quantity, nutrition information, ingredient declarations, and other mandatory information. Marketing claims should be evaluated carefully because statements that cause a dietary supplement to be represented as a drug can create significant regulatory risk.

Importers should also establish appropriate documentation for supplier qualification, specifications, testing, manufacturing controls, certificates and records, and shipment information. A robust FDA import compliance strategy should allow the company to demonstrate that the product entering the United States is manufactured and controlled in accordance with applicable requirements.

Import Risks and Recent Regulatory Expectations

FDA import enforcement can have substantial commercial consequences. If FDA determines that an imported product appears to violate applicable law, the shipment may be detained. A final import refusal can require the product to be exported or destroyed under FDA and U.S. Customs and Border Protection oversight. Recent FDA activity demonstrates that CGMP compliance remains an important enforcement focus. For example, an FDA import alert published in April 2026 identified dietary supplement products associated with serious deviations from 21 CFR Part 111, including deficiencies involving manufacturing controls, testing, and recordkeeping.

FDA has also continued developing its regulatory expectations around new dietary ingredients. In March 2024, FDA issued final guidance addressing procedures and timeframes for New Dietary Ingredient Notifications, providing greater clarity on submission and review expectations. In 2026, FDA also announced a public meeting concerning dietary supplement innovation and the scope of dietary ingredients, reflecting continued regulatory attention to this area.

For international businesses, these developments reinforce the importance of treating import compliance as an integrated regulatory process rather than simply a customs exercise. Companies should evaluate foreign manufacturing controls, ingredient status, product claims, labeling, facility registration, Prior Notice, applicable supplier verification obligations, and import documentation before commercial launch. A proactive dietary supplement regulatory strategy can reduce the likelihood of detention, refusal, recalls, warning letters, and costly supply-chain interruptions. It can also help organizations identify compliance gaps before products are shipped and establish appropriate corrective and preventive measures. For professionals responsible for regulatory affairs, quality, international operations, or product commercialization, a clear understanding of FDA expectations is essential for successfully bringing dietary supplements into the U.S. market.