Ranked by evidence
Best Protein Supplements
The 8 highest-scoring protein supplements in Formulate's catalog, ranked by the same automated rubric we apply to every product: ingredient dose, bioavailable form, label transparency, safety, and third-party testing. No sponsorships, no pay-to-play.
Scored by the Formulate Research Team · Last reviewed May 2026
- 1
ThorneProtein Isolate - Chocolate21 grams of bioavailable protein with flavors and sweeteners derived from natural sources Great tasting, high-quality whey protein designed for athletes, aging individuals, and…
98A - 2
Transparent LabsGrass-Fed Whey Protein IsolateTransparent Labs Grass-Fed Whey Protein Isolate — powder format. Contains Grass-Fed Whey Protein Isolate, Calcium, Iron, Protein and 1 more. Supports: Energy, Gut Health, Founda…
98A - 3
ThorneWhey Protein Isolate - Vanilla21 grams of bioavailable protein with flavors and sweeteners derived from natural sources Great tasting, high-quality whey protein designed for athletes, aging individuals, and…
98A - 4
Optimum NutritionGOLD STANDARD 100% CaseinGOLD STANDARD 100% Casein scores 92/100 (A grade). Strengths: All ingredients have Grade A evidence.
93A - 5
ThorneMediClear Plus®Rice and pea protein powder with multi and more for support during an elimination or detox program* MediClear Plus is a rice and pea protein-based nutritional supplement, with a…
93A - 6
ThorneMediClear-SGS™ - ChocolateAll-in-one daily detox with protein, multi-vitamin, and multi-mineral support in a delicious chocolate flavor MediClear-SGS is a rice-and-pea protein formula with a complete mul…
93A - 7
ComplementOrganic Chocolate ProteinOrganic plant protein made with five real food proteins, plus organic chocolate to create a delicious flavor. Made with a transparent blend of real food proteins for a silky, ne…
90A - 8
ComplementOrganic Unflavored ProteinOrganic plant protein made with five real food proteins, and nothing else. A fully transparent formula with zero additives for a silky, never chalky texture.
90A
Frequently asked questions
What is the best protein supplement?
Thorne Protein Isolate - Chocolate is Formulate's highest-scoring protein supplement at 98/100 (grade A). 21 grams of bioavailable protein with flavors and sweeteners derived from natural sources Great tasting, high-quality whey protein designed for athletes, aging individuals, and…
How does Formulate rank protein supplements?
Each product is scored 0–100 by an automated rubric covering evidence quality, dose accuracy, bioavailable form, label transparency, safety, and manufacturing. Rankings reflect the formula on the label — not advertising or sponsorships.
How many protein supplements were compared?
This ranking shows the top 8 protein products Formulate has scored. Browse the full catalog for every product and its breakdown.
Best supplements by category
How these are ranked
Every protein product is scored on dose accuracy, ingredient form, certifications, transparency, and third-party testing — the same rubric across the whole catalog. See the methodology page for the full breakdown, or browse every supplement.
Educational only. Rankings reflect product formulation quality, not personalized medical advice. Talk to a qualified healthcare provider before starting a new supplement, especially if you take medication.