How the UK supplement industry is regulated

Food supplements and medicines have different roles

A capsule is a format, not a regulatory category. MHRA guidance explains that familiar substances such as vitamins, minerals and amino acids are generally subject to food safety and labelling rules unless they are presented for medicinal use. The MHRA considers both claims and active substances when assessing whether a product is a medicine. [1]

This means you should read what a product is sold as, rather than judging from its packaging. A dark glass bottle, technical ingredient name or laboratory image does not tell you which framework applies. Nor does the fact that a product can be ordered online answer questions about its status.

Understand what a health claim is saying

Health claims describe a relationship between a food or constituent and health. In Great Britain, the official nutrition and health claims register provides authorised and non-authorised health claims and relevant conditions. The register is a useful place to begin checking a claim; it is not a catalogue of approved supplement brands. [2]

Copy the wording of the advertisement before searching. Then identify the nutrient or substance being discussed. Ask whether the statement in front of you matches the scope and conditions of the relevant entry. A similar-sounding claim is not necessarily the same claim, particularly when a marketer adds stronger or broader language.

Watch the step from ingredient to product

ASA guidance says that a permitted claim must relate to the nutrient or food for which it is authorised, rather than being reassigned to the whole product. It also explains that broad statements about general health need an appropriate accompanying specific authorised claim. [3]

Consider a fictional advert for a blend with several ingredients. If a claim is authorised for one nutrient, the presence of that wording does not establish equivalent evidence for everything else in the blend. Read which ingredient is linked to the statement and resist filling in the rest from the product name or design.

Recognise promises that cross into treatment

Official UK labelling guidance says food cannot claim or imply that it treats, prevents or cures disease or a medical condition. A scientific-looking reference does not remove that restriction. [4]

Take care with the overall message, not only individual words. A page can imply treatment through its headline, testimonials, before-and-after stories or surrounding imagery. When an ordinary supplement is being sold as an answer to a diagnosed condition, use that as a reason to check the claim and seek appropriate care, rather than treating the promise as established information.

Keep research and advertising permission separate

A study asks an empirical question: what happened under the conditions tested? Advertising rules ask a different question: what may be said about the marketed product? Finding a published paper is therefore a starting point for assessing evidence, not an automatic permission slip for every possible sales claim.

Likewise, careful wording is not a personalised recommendation. A consumer still has to consider the ingredient amount, their own circumstances and whether a purchase has a clear purpose. Record what the source actually supports and avoid converting an authorised relationship into a guarantee that you will notice a particular outcome.

Check the part of the UK that applies

The rules and registers should be read with geography in view. Government guidance distinguishes Great Britain from Northern Ireland, where relevant EU nutrition law continues to apply under the applicable arrangements. Businesses planning claims across markets need to check the current official guidance for each market. This article is a consumer overview, not a legal assessment of a particular product. [5]

For shoppers, the practical habit is simpler: identify the seller, keep a copy of the listing, and use the relevant official source when a claim matters to your decision. Screenshots are especially useful if wording changes after purchase. Clear questions produce a more useful response than asking whether an entire brand is 'approved'.

• What is the product sold as: a food supplement or a medicine?
• Which exact ingredient is connected to the claim?
• Does the relevant register support that wording and its conditions?
• Is the page implying prevention, diagnosis or treatment?
• Which market's guidance applies to the claim I am checking?

Common questions

Does an authorised health claim mean the government approved the brand?

No. The register concerns particular claims and their conditions. It does not list supplement brands as generally approved or guarantee a result for an individual customer. [2]

Can a supplement advertisement rely on a scientific paper alone?

Published research does not replace the applicable advertising rules. Evaluate whether the study supports the statement and whether the claim is permitted in the relevant market; these are separate questions. [3][4]