Ranked by purity evidence (CLP + CR)

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.

Source: Clean Label Project · Consumer Reports
Do buy

Non-chocolate whey powders in CLP’s Clean Sixteen, prioritized for current transparency and exact-product verification.

Do not buy

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)

DO NOT BUY3 CR-tested caution picks

3 flagged products · independent lab citations on each detail page

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.

Other Parents Longevity Lab categories