A good protein-powder comparison begins on the back of the pack. Marketing names can be useful signposts, but the nutrition table, ingredients, allergen declaration and directions tell you what you are actually buying.
1. Compare protein per 100 g
Serving sizes differ, so protein per 100 g gives you a consistent starting point. Then check protein per serving using the maker's stated portion.
2. Read the ingredients in order
Ingredients are listed by weight. Look for the named protein source and remember that recipes may change between flavours.
3. Check emphasised allergens
Whey and casein come from milk; soy products contain soy. UK guidance requires common allergens in the ingredients list to be emphasised. Never rely only on a collection name or front-of-pack photograph.
4. Follow directions and storage information
Use the stated serving instructions, do not exceed any recommended amount, and store the product as directed. Check the best-before date and seal after opening.
5. Be cautious with claims
UK government guidance says foods must not claim or imply that they treat, prevent or cure disease. Look for clear factual information rather than dramatic promises.