Verdict
Optimum Nutrition has the higher average TLL Label Score (70 vs 65) across the products we score.
Lower listed average price per serving: Optimum Nutrition at £1.25/serving on average. Catalogue mixes and serving sizes differ; this is not a comparison of equivalent doses or a prediction of results. Delivery and checkout costs are excluded, and no approved purchase offer is implied.
| Optimum Nutrition ★ Higher avg | Per4m | |
|---|---|---|
| Research records | 18 | 19 |
| Categories covered | 10 | 12 |
| Avg TLL Label Score | 70 | 65 |
| Approved best score | 97 | 95 |
| Avg cost / serving | £1.25 | £1.33 |
Category head-to-head
Alphabetically selected research examples where both brands have records; no product winner is selected.
Whey
88/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://www.optimumnutrition.com/en-gb/products/gold-standard-100-whey-protein-powder-eu, checked 19 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Optimum Nutrition
Gold Standard 100% Whey£0.74/serving
★ Winner
55/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://per4mbetter.com/products/advanced-protein-blend, checked 23 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Per4m
Advanced Protein BlendWhey Isolate
40/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://www.optimumnutrition.com/en-gb/products/clear-whey-protein-isolate-collagen-powder, checked 23 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Optimum Nutrition
Clear Whey Protein Isolate + Collagen Powder - 240g (10 Servings)£2.00/serving
91/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://per4mbetter.com/products/chocolate-creme-isolate-zero, checked 19 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Per4m
Per4m Isolate£1.17/serving
★ Winner
Creatine
95/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://per4mbetter.com/products/creatine-sherbet-stick-packs, checked 25 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Per4m
Creatine Sherbet Stick Packs£1.25/serving
Pre-Workout
42/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://www.optimumnutrition.com/en-gb/products/gold-standard-pre-workout-powder-eu, checked 23 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Optimum Nutrition
Gold Standard Pre-Workout Powder - 330g (30 Servings)£0.90/serving
EAAs
20/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://www.optimumnutrition.com/en-gb/products/essential-amino-energy-powder, checked 19 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Scored against our EAA reference amounts. This product also contains 100 mg caffeine per serving and is not suitable for children or pregnant or breastfeeding women.
Optimum Nutrition
Essential Amino Energy£0.73/serving
Post-Workout
91/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://shop.theliftinglab.co.uk/products/optimum-nutrition-serious-mass, checked 25 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Category note: the live catalogue says post-workout; this score uses the mass-gainer curve. Energy is protein plus carbohydrate only, 1200 kcal (fat is not in the live panel). Brand name unchanged.
Optimum Nutrition
Serious Mass£3.12/serving
★ Winner
56/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://per4mbetter.com/products/glutamine, checked 23 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Provisional Method B score with weak outcome evidence (glutamine-only). No recovery, gut, or immune outcome claims beside the number.
Per4m
GlutamineHydration
78/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://www.tesco.com/groceries/en-GB/products/322153303, checked 19 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Carbohydrate: — (not declared on the UK label; this part isn't scored and the score is rescaled over the other components).
Optimum Nutrition
Electrolyte Powder£0.30/serving
★ Winner
50/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://per4mbetter.com/products/hydrate-electrolyte-mix-blackberry, checked 23 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Per4m
Hydrate Electrolyte Mix£0.83/serving
Protein Bars
97/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://www.optimumnutrition.com/en-gb/products/chocolate-caramel-whipped-protein-bar-20g, checked 23 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Optimum Nutrition
Chocolate Caramel Whipped Protein Bar - 20g high proteinJoint Health
90/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://www.optimumnutrition.com/en-gb/products/collagen-peptides, checked 23 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Provisional Method B score (joint-health). Serve-size panel variants noted. The number is not an authorised joint, skin, or bone health claim.
Optimum Nutrition
Collagen Peptides£1.25/serving
★ Winner
82/100TLL Label ScoreDose & label check
TLL Label Score rates what's on the label, not the results you'll get. It compares stated doses with amounts used in published research and checks how transparent the label is. It isn't a health claim or medical advice. Source: https://per4mbetter.com/products/advanced-curcumin-capsules, checked 23 Oct 2026. How we scoreThe TLL Label Score compares the ingredients and amounts declared on the label with the amounts used in published research on those ingredients, and checks how transparent the label is. It rates what's on the label, not the results you'll get. It isn't based on claims made by the brand, doesn't reflect our view of the company, and isn't medical advice. It's for general information only.
Provisional Method B score (joint-health curcumin). The number is not an authorised anti-inflammatory or joint health claim.
Per4m
Advanced Curcumin Capsules