How to Read a Food Supplement Label in the UK: 7 Checks Before You Buy

September 19, 2026

To read a food supplement label, check what the product is, the full daily dose, the amounts and forms of its ingredients, allergens, warnings, storage and the business responsible for it. Then compare those details with the current product page. A front-label promise is not a substitute for this information.

These seven checks help you compare labels before buying. They do not tell you whether a supplement is suitable for you. This is a consumer guide, not legal or medical advice.

1. Check that it is a food supplement

Look for the words "food supplement" and a description of the vitamins, minerals or other substances that characterise the product. A name such as "daily drops" or "wellness blend" does not tell you enough on its own.

Food supplements are regulated as food, not medicines. They are intended to supplement a normal diet, not replace a varied and balanced one. A liquid, capsule, gummy or powder can all be a food supplement; the format alone does not establish its suitability.

2. Find the complete recommended daily dose

Read the directions before comparing ingredient amounts. One capsule, one gummy or one dropper may not be the full daily portion. Check both the amount taken at a time and how often the label says to take it.

For liquids, look for a clear measurement such as millilitres. Do not assume that every dropper holds the same amount or that a number of drops equals a full dropper. Follow the instructions for the product in your hand and do not exceed its stated recommended daily dose.

Compare the supply, not just the pack size

To estimate how long a pack lasts, divide its total quantity by the recommended daily quantity, using matching units. For example, a hypothetical 60ml bottle with a 2ml daily portion contains 30 daily portions. A hypothetical 60-capsule pack with a two-capsule daily portion also contains 30 daily portions.

For a price comparison, divide the price you would actually pay by those daily portions. Include delivery charges and check whether a displayed price requires a subscription. This is a cost comparison, not evidence that either product is better.

3. Read the full ingredients, daily amounts and forms

The ingredients list tells you what is in the product, including ingredients such as carriers, flavourings and sweeteners. Ingredients are generally listed in descending order of weight. Do not stop at the plant or nutrient names on the front of the pack.

The daily-amount declaration answers a different question: how much of the substances with a nutritional or physiological effect does the recommended daily portion provide? Food-supplement rules require these amounts to be stated numerically per recommended daily portion. Check the units as well as the number.

A formula percentage and an amount per daily portion are not interchangeable. If a botanical label gives a percentage or extract ratio, check what it refers to. Ask the seller if the daily amount is unclear rather than translating a plant name or ratio into a health outcome.

Also check the form. A dried plant powder, liquid extract and isolated compound are different descriptions. A long ingredient list does not, by itself, establish strength, quality or suitability.

What does NRV mean on a supplement label?

NRV means Nutrient Reference Value. Vitamins and minerals covered by the labelling rules are declared with their amounts and a percentage of the relevant reference value. The percentage gives a reference for reading the label; it is not a personalised assessment of what you need.

Do not treat 100% NRV as an instruction to take that amount from supplements, or a larger percentage as automatically better. Keep the recommended daily dose separate from the NRV percentage, and consider other supplements you already take when asking a pharmacist or GP about suitability.

4. Make allergens a separate check

Read the complete ingredients list for allergens that matter to you. The regulated allergens must be identified and highlighted in the ingredients list, for example in bold or a different type style. A "may contain" statement is a separate warning about possible accidental presence, not a substitute for the ingredients list.

Check again when you buy a new pack because ingredients can change. Words such as "natural", "plant-based" or "vegan" do not replace an allergen check. If you have an allergy and the information is unclear, ask the seller before buying or using the product.

5. Read warnings, dates and storage instructions

Food-supplement labels must include a warning not to exceed the recommended daily dose, a statement that supplements should not be used as a substitute for a varied diet, and a statement that the product should be stored out of the reach of young children.

Read any additional warnings, age restrictions and instructions for use. If you take medicines, are pregnant or breastfeeding, have a health condition, or are unsure whether an ingredient suits you, ask a pharmacist, GP or other qualified health professional before use.

Find the date marking and the storage instructions, including anything that changes after opening. A best-before date relates to quality; a use-by date relates to safety. Do not use a product after its use-by date. Dates depend on following the storage instructions, so do not assume every liquid supplement needs the same storage conditions.

If the label says to use the product within a certain time after opening, note the opening date. Keep the packaging and batch details so you can identify the product if you need to ask the seller a question.

6. Identify the responsible business and check the claims

Look for the name and address of the food business responsible for the product information, plus a clear way to contact the seller. "Made in the UK" and "sold by a UK company" are different statements; check which one is actually made.

Words such as "premium", "clean" and "advanced" need an explanation if they are to help you compare products. They do not replace the daily amounts, ingredient forms or warnings.

A food supplement should not be sold with claims that it prevents, treats or cures a medical condition. For health claims in Great Britain, check the Great Britain nutrition and health claims register and the conditions attached to a claim. A claim about a nutrient is not a guarantee of a result from every product containing it.

Great Britain means England, Scotland and Wales. Northern Ireland follows a different legal framework for food supplements and nutrition and health claims. Do not assume that a GB claims check settles the position for Northern Ireland.

7. Compare the current product page with the pack

Before ordering, look for readable ingredient, direction and warning information online. Compare the bottle or pack with the current product page when it arrives, especially:

the recommended daily portion and frequency;
ingredient amounts, forms and allergens;
pack quantity and the number of daily portions;
warnings, date marking and storage;
the responsible business and contact details;
one-time or subscription terms, price and delivery charges.

If the two disagree, ask the seller to explain before using the product. An older blog post, advertisement or review should not overrule the instructions for the current pack.

Using the checklist with Havern

You can start with Havern's current product information and Before you buy page, then compare them with the label on the bottle you receive. Check the complete daily portion, ingredients, warnings and storage rather than relying on the product name.

These are brand-provided details, not independent proof of a health outcome. If any detail is missing or unclear, contact Havern before use.

Frequently asked questions

Does 100% NRV mean I need that supplement?

No. NRV is a labelling reference for a vitamin or mineral, not a personal recommendation or a diagnosis. Read the daily dose and ask a qualified health professional if you are unsure what suits you.

Does a long ingredient list mean a stronger supplement?

No. Check the daily amounts, units and ingredient forms. The number of ingredients alone cannot tell you whether a product is suitable for you.

How do I compare two bottles with different daily doses?

Compare the amounts provided by each complete recommended daily portion, then calculate the number of daily portions in each bottle. Do not compare a single dropper from one product with a full day's portion from another.