Protein powders
Clean Label Project Protein Study 2.0 tested roughly 160–165 protein powders for arsenic, cadmium, lead and mercury via ICP-MS. CLP’s live page says absence from the Clean Sixteen is not automatically a fail and links a June 2025 Clean Sixteen one-sheeter labeled “by purity”; that PDF names 16 products as non-detect for lead, cadmium, mercury and arsenic but does not publish per-product numeric values. This parent-care top 3 follows the one-sheeter’s first three while still treating them as a clean non-detect tier and using current transparency, additive simplicity, and image-verification confidence as tie-breakers. Consumer Reports 2025/2026 adds multi-lot, product-specific context: strong caution signals for some plant/mass-gainer powders and a newer low-lead watchlist showing select chocolate powders can be cleaner than the category stereotype. Certification seals are not treated as heavy-metal non-detect unless paired with product-specific results. CR also tested protein content and reported that the 2025 products met or exceeded their label protein claims, so this ranking is not making an amino-spiking allegation without product-specific evidence.
Non-chocolate whey powders in CLP’s Clean Sixteen, prioritized for current transparency and exact-product verification.
CR-tested plant powders with high lead and/or cadmium per serving now replace weaker generic caution placeholders; organic, NSF/sport, or “clean” marketing claims do not override product-specific metals results.
DO BUYTop 3 cleanest verified picks
3 verified picks · ranked by purity evidence (clp + cr)
Puori PW1 Grass-Fed Whey Protein, Bourbon Vanilla
Grass-fed Danish whey with bourbon vanilla — in CLP’s Clean Sixteen, plus unusually strong batch-level transparency.
Clean Sixteen tie · whey concentrate · strongest public transparency
Wellbeing Nutrition Whey Protein Isolate
Unflavoured whey isolate with probiotics — in CLP’s Clean Sixteen and easy to verify on the live brand page.
Clean Sixteen tie · unflavoured whey isolate
ISOPURE Unflavored Protein
Widely available unflavored whey isolate in CLP’s Clean Sixteen, with a currently verifiable exact product page.
Clean Sixteen tie · unflavored whey isolate · mainstream availability
DO NOT BUY3 CR-tested caution picks
3 flagged products · independent lab citations on each detail page
Naked Nutrition Vegan Mass Gainer — Vanilla
Consumer Reports found the highest lead result in its 2025 protein test here: 7.70 mcg lead per serving.
CR 2025: 7.70 mcg lead/serving · plant mass gainer
Huel Black Edition — Chocolate
CR found 6.31 mcg lead plus 9.21 mcg cadmium per serving — the clearest dual lead/cadmium caution in the current evidence set.
CR 2025: 6.31 mcg lead + 9.21 mcg cadmium/serving
Garden of Life Sport Organic Plant-Based Protein — Vanilla
CR’s 2025 test put this NSF Certified for Sport plant protein in the once-a-week caution group for lead.
CR 2025: 2.76 mcg lead/serving · 1.93 mcg cadmium
Homepage podium summary uses 3 best + 3 worst rows from the same dataset. Tap any row above for the full per-product writeup, citations and verdict.





