Protein powder labels: UK buying dossier
Protein powders become comparable only after the food source, exact flavour and stated portion are aligned.
Compare source, protein basis, variant ingredients and pack use
Protein powders become comparable only after the food source, exact flavour and stated portion are aligned.
Protein source
01Compare: Compare whey, casein, soy, pea, rice or another explicitly named protein source.
Why it matters: Source changes dietary fit and allergen evidence; “protein blend” can hide proportions.
Evidence check: Use the current ingredients list and mark undisclosed blend composition as unknown.
Protein per stated portion
02Compare: Compare grams of protein on the same stated basis, separate from total scoop or serving mass.
Why it matters: A large scoop or front-label percentage can make unlike quantities look comparable.
Evidence check: Record protein amount, serving mass and preparation basis together.
Flavour ingredients and allergens
03Compare: Compare sweeteners, flavour-specific ingredients, emphasised allergens and precautionary wording.
Why it matters: Different flavours in one range can have materially different formulas.
Evidence check: Use the exact selected flavour’s physical label.
Servings, pack and preparation
04Compare: Compare net quantity, stated servings, scoop definition and whether values assume water, milk or another preparation.
Why it matters: Pack economics and labelled values can change with preparation assumptions.
Evidence check: Calculate cost only from the same amount basis and treat scoop accuracy as approximate unless verified.
Three checks before checkout
Enough detail to make the choice better informed and clearer, without turning a quick buying decision into a compliance manual.
- 1 Compare protein source, amount per stated portion, flavour-specific ingredients, allergens and pack size.
- 2 Match the exact flavour, variant, pack and formula rather than a similar marketplace image.
- 3 Use the current physical label for ingredients, allergens, warnings and stated serving information.
Take the next useful step
Continue to the closest practical comparison or official source.
Why these checks matter in the UK
Compare the food label, ingredients, amount per stated serving, warnings and allergens; do not use the page as medical advice.
Food supplements are regulated as foods rather than medicines.
Great Britain · current
Treat a claim as a constrained label statement, not proof that the product will deliver the outcome for a particular person.
Nutrition and health claims used in Great Britain need an authorised basis and must meet the exact conditions of use.
Great Britain · current
Check the market named on the label and use the matching official source rather than assuming one UK-wide claims register.
Some food-supplement and claims rules differ between Great Britain and Northern Ireland.
Great Britain, Northern Ireland · current
Sources and review boundaries
- Department of Health and Social Care: Food supplements guidance — reviewed 2026-08-03; Food-supplement rules differ between Great Britain and Northern Ireland in some areas.
- Department of Health and Social Care: Great Britain nutrition and health claims register — reviewed 2026-08-03; A listed claim remains subject to its exact conditions of use and the product label.