How We Review Protein Powders & Supplements

By the Bodybuilding Legends team · Updated 2026 · Methodology

Supplements are a crowded, hype-heavy category, so every recommendation on this site is built on a consistent, published standard. This page explains exactly what we measure, how we weight it, and what would keep a product off our list — so you can judge our picks for yourself.

Our review criteria

Criterion	Weight	What we look for
Protein quality & source	30%	Source and form (whey concentrate, isolate, casein, plant blends), completeness of the amino-acid profile, and protein per serving.
Ingredient transparency	25%	Clear labels, no proprietary blends hiding doses, minimal fillers, and sensible added ingredients.
Third-party testing	20%	Independent testing for label accuracy and contaminants (e.g. informed-choice / NSF-style certification where available).
Taste & mixability	15%	Whether people will actually drink it daily: flavour, texture and how well it dissolves.
Value per serving	10%	Cost per gram of protein, not just headline price.

Our evidence standard

Match to goal. We judge each product against its intended use — lean isolate for cutting, blends for daily muscle-building, plant proteins for dietary needs — rather than one-size-fits-all.

Read the full label. We check protein per serving against total serving size, spotting amino-acid spiking, filler-heavy formulas and proprietary blends.

Prioritise tested products. Because supplements are lightly regulated, independent third-party testing carries real weight in our scoring.

Weigh real-world adherence. The best protein is the one you take consistently, so taste, mixability and value materially affect the ranking.

Cross-check claims. We rely on established nutrition science and published product data, not marketing language, and we say plainly when evidence is limited.

What keeps a product off our list

We will not recommend products with opaque proprietary blends that hide protein dosing, amino-acid spiking that inflates the protein number, excessive fillers or sugar, or unsupported health claims. A big brand name is not a substitute for a clean, transparent label.

Independence & how we stay free

We do not sell placement or accept payment for favourable reviews. Some links are partner links, and buying through them may earn the site a small commission at no cost to you. That keeps our guides free, but picks are decided by the criteria above before any link is added.

Not medical advice

Our guides are educational and are not a substitute for advice from a doctor or registered dietitian. If you are pregnant, have a medical condition or a food allergy, check with a qualified professional before adding a supplement.

See the methodology in action:
Best Protein Powder · Whey vs Isolate · Best Protein for Women · Protein & Supplements Hub

Frequently asked questions

Do brands pay to be recommended? No. Products are chosen on merit against our published criteria — protein quality, ingredient transparency, third-party testing, taste and mixability, and value per serving. Some links may be partner links that earn a small commission if you buy, at no extra cost to you, and this never affects which products we recommend.

Is your advice medical or nutritional advice? No. Our content is general educational information to help you compare products and understand protein basics. It is not personalised medical or dietary advice. If you have a health condition, allergy or specific goal, consult a qualified doctor or registered dietitian.

How do you judge protein quality? We look at the protein source and form (for example whey concentrate vs isolate vs plant blends), the protein-per-serving and per-dollar, the completeness of the amino acid profile, added fillers or proprietary blends, and whether the product carries independent third-party testing for label accuracy and contaminants.

How often are recommendations updated? We review each guide at least annually and whenever formulas change, products are discontinued, or new evidence emerges. Every guide shows a visible 'Updated' date so you know how current the advice is.