Are UK supplements regulated?

Yes. UK supplements are regulated under food law, with primary day-to-day oversight from the Food Standards Agency (FSA), advertising oversight from the Advertising Standards Authority (ASA), and intervention from the Medicines and Healthcare products Regulatory Agency (MHRA) when products cross into medicinal claims. There is no pre-market approval requirement (except for novel foods), but compliance with permitted ingredients, authorised EFSA health claims, labelling rules, traceability, and safety obligations is mandatory. 'Regulated as food not medicine' is sometimes used as a synonym for 'unregulated' in consumer journalism — that is misleading. The framework is real and enforceable, just less stringent than the medicines licensing pathway.

Can I trust supplements MHRA hasn't approved?

MHRA does not approve food supplements as a default — that is not what MHRA does. MHRA's supplement role is limited to borderline products (medicinal claims), specific safety alerts, and enforcement against products containing undeclared pharmaceutical ingredients. The fact that MHRA has not approved a particular vitamin or mineral supplement is not a negative signal — it would be unusual for MHRA to have approved one. The trust signals you can look for are: compliance with EFSA-authorised health claims, third-party certification (Informed Sport, NSF Certified for Sport, USP Verified), brand transparency on sourcing and testing, and absence of disease claims or undeclared pharmaceutical ingredients.

Why do US supplements have different label rules?

US supplements operate under DSHEA 1994, which permits 'structure/function' claims like 'supports immune health' or 'helps maintain healthy joints' without pre-approval, provided they carry the DSHEA disclaimer. UK and EU supplements operate under Regulation 1924/2006 (retained in GB law), which permits only health claims that have been independently evaluated by EFSA and authorised by the European Commission. EFSA has rejected the majority of proposed claims, so authorised UK label wording is markedly more conservative than typical US wording. A US supplement bottle may say 'supports prostate health'; the closest authorised UK equivalent would typically be a more anatomical statement about a specific nutrient's role. This is one reason US supplement labels look more therapeutic than UK ones.

What's an EFSA-authorised health claim?

An EFSA-authorised health claim is a label statement that the European Food Safety Authority has reviewed against the published clinical literature and the European Commission has formally authorised for use on food and supplement labels. The authorised claims are listed on the GB Nutrition and Health Claims (NHC) register and the equivalent EU register. They are typically narrow, clinically conservative, and tied to specific dose ranges. Examples: 'Vitamin D contributes to the maintenance of normal bones', 'Iron contributes to the reduction of tiredness and fatigue', 'Caffeine helps to increase alertness'. Any health claim on a UK supplement label that is not on the authorised register or the on-hold botanical list is non-compliant and exposed to ASA enforcement.

Is CBD regulated differently?

Yes. CBD is treated as a novel food in Great Britain because there is no significant history of consumption in the EU/UK before May 1997. Under retained EU Novel Food Regulation 2015/2283, CBD products require pre-market authorisation. The FSA opened a registration window in 2020 and produced a public list of CBD products with valid novel food applications. Products on the validated list are allowed to remain on sale pending final authorisation; products not on the list are not legally compliant. CBD products containing controlled cannabinoids above prescribed thresholds (THC) fall under the Misuse of Drugs Regulations and are an MHRA / Home Office matter. CBD as a medicinal product (e.g., Epidyolex for paediatric epilepsy) is licensed by MHRA via the medicines route.

Where do I report a supplement side-effect in the UK?

Through the MHRA Yellow Card scheme at yellowcard.mhra.gov.uk. The scheme accepts reports from consumers, healthcare professionals, and manufacturers for any suspected adverse event associated with a medicine, vaccine, medical device, or food supplement. You can submit online or via the Yellow Card app. If you suspect a serious side effect, the parallel sensible action is to stop the supplement and discuss with a GP, NHS pharmacist, or NHS 111 — they can also help you submit a Yellow Card report and assess whether further clinical investigation is warranted. Reports feed into MHRA's pharmacovigilance signal detection and are shared with European and international regulators.

MHRA vs FDA on Supplements: What UK Buyers Should Know

Nutripedia Research Team30 March 2026

British and American supplements are regulated similarly on paper — both as foods, not medicines — but the detail diverges in places that matter for the UK buyer. We walk through MHRA's, FSA's, and ASA's roles, the FDA's DSHEA framework, the EFSA health claims register, and where the systems overlap or part ways.

Not medical advice

Nutripedia summarises published peer-reviewed research. This content is for informational purposes only and is not a substitute for professional medical advice. Product mentions are not endorsements.

Two Systems, Same Underlying Principle

British shoppers buying supplements from UK retailers, and British shoppers ordering products from US sites that ship internationally, are operating across two regulatory systems that share a common philosophical starting point — supplements are foods, not medicines — but diverge in how they police claims, contaminants, and adverse-event reporting. **Disclaimer.** Nutripedia summarises published research and regulatory information. We do not provide medical advice. Consult a UK GP, NHS pharmacist, or registered dietitian before starting any supplement, especially if pregnant, breastfeeding, on prescription medication, or managing a chronic condition. This article is an educational explainer of the regulatory landscape, not a buying guide or a clinical recommendation. For a UK buyer, the practical questions are: who actually checks British supplements? What does an EFSA-approved health claim mean? When does MHRA step in? Where do you report a side effect? Is a US supplement safer or less safe than a UK equivalent? This article works through each of those questions in turn.

Our research is based on 12 peer-reviewed studies. View the full evidence database

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Nutripedia is an educational resource. Content is sourced from peer-reviewed studies and does not constitute medical advice. Product mentions are not endorsements. Consult a healthcare professional before starting any supplement.

Reviewed by

Archie Roberts

Founder, Nutripedia — ALDR Ltd

This page summarises published research from PubMed, NHS, EFSA, and SACN. It does not constitute medical advice; consult a qualified healthcare professional before changing any supplement regimen.

Last reviewed: 30 Mar 2026Methodology