Supplements in the UK are regulated as food, not medicine. That single fact explains most of the rules.
Food, not medicine
Food supplements do not go through pre-market approval for efficacy the way medicines do. There is no regulator confirming that a supplement works before it is sold. Responsibility for safety and legality sits with the business selling it.
The claims regime
What a brand may say is tightly controlled. Only authorised health claims may be used, in authorised wording, tied to a specific nutrient at a qualifying amount. A claim not on the register may not be used, however true the seller believes it to be.
Novel foods
Ingredients without a significant history of consumption in the UK before May 1997 require authorisation before being sold as food. This is why the status of some newer compounds is contested.
Where the line sits
Present a product as treating or preventing disease, or supply it by injection to alter physiological function, and it may be treated as a medicine — which requires a licence.
Why this shapes our copy
Much of what we do not say is a direct consequence of this framework. Restraint in supplement copy is usually a regulatory fact rather than a stylistic choice.
This article is general information, not legal advice.
