How To Read a Protein Label (Without Kena Conned)
3 min read
Supplement labels are a masterclass in making average products look amazing. Big numbers, science-y words, shiny claims. Walao, so much noise. Here's how to cut through it and judge a tub properly.
1. Check protein PER SERVING vs per 100g
The front of the tub often screams "80% PROTEIN!" — that's per 100g of powder. What matters day to day is protein per scoop, because the scoop also contains flavouring, thickeners and sweeteners.
Do the maths: protein grams ÷ serving size in grams. If a 35g scoop only gives 22g protein, that's ~63% — decent, but not the 80% the front implied.
2. Watch the serving-size trick
Some brands quote a great protein number... for a two-scoop serving. Always check how many scoops the "per serving" figure assumes, and how many servings are really in the tub. A "30 serving" tub at two scoops each is actually 15 real servings.
3. Look at the ingredients order
Ingredients are listed by weight, most first. For a protein powder, you want the protein source at the top (whey isolate, whey concentrate, soy isolate, pea protein, etc.). If sugar, maltodextrin or fillers appear high up, be suspicious — you might be buying flavoured carbs.
4. Beware "proprietary blends" and amino spiking
Two red flags:
- Proprietary blend: when a brand hides the exact amounts of each ingredient behind a "blend," you can't tell how much of the good stuff you're actually getting.
- Amino spiking (nitrogen spiking): cheap free-form amino acids like glycine or taurine get added to inflate the protein number on lab tests, without giving you real complete protein. If you see lots of added single amino acids padding the list, be wary.
5. Sweeteners and additives
Most protein powders use artificial or natural sweeteners (sucralose, stevia). These are safe for the vast majority of people — the main thing is personal preference and how your stomach handles them. Thickeners like xanthan gum and lecithin are normal and harmless. Nothing to panic about.
6. Third-party testing = trust
The gold standard: look for third-party testing seals (like Informed Sport or NSF Certified for Sport). These mean an independent lab verified what's actually in the tub. Especially important if you're a tested athlete, but a good sign of quality for anyone.
7. Price per gram of protein — the real comparison
Don't compare tubs by sticker price. Compare by cost per gram of protein:
(Price of tub) ÷ (servings × protein per serving) = cost per gram
This single number cuts through all the marketing and tells you what's actually good value. A "premium" tub is sometimes worse value than a plain one.
Your 30-second label checklist
- Protein per scoop (not per 100g) — is it 20g+?
- How many scoops per serving, and real servings per tub?
- Is the protein source listed first?
- Any proprietary blend or heavy amino spiking? (Avoid.)
- Third-party tested? (Bonus points.)
- Cost per gram of protein vs alternatives?
Nail those six and you'll never overpay for a fancy tub again.
Next up: figure out which type of protein powder suits you, or go back to the basics.