How We've Read the Labels for You
Written by Martin Rhodes · Last reviewed August 2026
Making the information easier to understand
A supplement label can contain a lot of information. Ingredients, forms, amounts, serving information and other details can make it difficult to know what is important and what you should be looking at.
We've taken the time to look closely at this information so we can explain it in straightforward language.
Our aim isn't to make you become an expert in supplement labels. It's to make the information easier to understand, so you can see what a product contains and understand the information you're given.
What should I look for on a supplement label?
There are several parts of a supplement label worth understanding.
The ingredients
The ingredients tell you what the product contains.
We look at the ingredients used in a product and how they are presented, including the form in which an ingredient is provided where relevant.
Some ingredient names can sound complicated. That's why we want to explain the terminology rather than expect you to work it out yourself.
The form of the ingredient
Some nutrients and other ingredients can be provided in different forms.
When this is relevant to one of our products, we'll explain the form being used and provide the information you need to understand the product.
The amount
The label provides information about the amount of relevant ingredients in the product.
We look at those amounts alongside the serving information rather than looking at a number in isolation.
A larger number doesn't automatically mean a product is a better choice. The amount needs to be considered alongside the ingredient, the product and its recommended use.
Serving information
Serving information helps put the amounts on the label into context.
It shows how the stated amounts relate to the recommended serving of the product.
We'll make this information clear on our product pages, so you don't have to work through the label yourself.
What does NRV mean?
You may see NRV on a vitamin or mineral supplement.
NRV stands for Nutrient Reference Value. It is a reference value used when declaring certain vitamins and minerals on food labels.
The percentage shown can provide useful information about the amount of a nutrient in relation to its NRV, but it doesn't by itself tell you whether a particular supplement is right for you.
What about the other ingredients?
Not everything listed on a supplement label is necessarily a vitamin, mineral or other main ingredient.
A product can also contain ingredients used to make or maintain the form of the product, such as a capsule or tablet.
We want you to be able to see the full ingredient information rather than just the headline ingredients.
What information should a supplement label include?
Food supplements in Great Britain are subject to specific labelling requirements. The current Food Standards Agency guidance covers the information consumers should be given and how supplements should be labelled and presented.
The information provided should be clear and should not mislead the consumer.
That's important to us too.
Why we've made this easier
You shouldn't have to spend time trying to decode every part of a supplement label before you can understand what you're buying.
We've looked at the information, considered what matters and presented it in a way that's easier to follow.
Clear information shouldn't be difficult to find.
That's the approach we're taking with every This One Is product.
Want to know more about the amount?
Understanding the label is one part of choosing a supplement. The amount provided is another.