Supplement Safety Articles

Evidence-based analysis of heavy metal testing and safe alternatives.

Last updated: August 8, 2026 · Tracking heavy-metal testing, recalls & lawsuits across 40+ brands.

๐Ÿฅ› Protein Powder Safety

Costco vs. Sam's Club: Which Is Cleaner?

Both clubs sell ON Gold Standard and OWYN Pro Elite. Neither house brand has ever been tested. Full head-to-head comparison.

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Lead in Protein: 28 Brands Ranked

Our most viewed resource. Every brand tested by CR, ranked from safest to most contaminated.

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Lead-Free Protein Database

Complete data on 134+ brands. Which are verified safe and which are still untested? Updated January 2026.

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ON Gold Standard Analysis

Why the world's most popular protein powder earned a #5 safety ranking.

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Premier Protein Analysis

Does the viral Costco shake contain lead? We break down the powder vs. liquid results.

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Safest Mass Gainer 2026: All 6 Ranked by Lead

The safest protein powder Consumer Reports tested is a mass gainer. So is the most contaminated โ€” at 1,572% of the lead limit. A 63ร— spread inside one category, and one clear dividing line.

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Fairlife Safety Verdict

Is Core Power safe? Analysis of Fairlife's heavy metal risks and 2026 data.

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Naked Nutrition Warning

Why this brand ranked #23 (Worst) with 1,572% of CR’s level of concerns.

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Best Cheap Protein Powder (2026)

Only two brands under $1/serving have real independent heavy metal verification. Body Fortress and ON Gold Standard beat "budget" names like Nutricost and Six Star on price and proof.

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Is Nutricost Whey Safe?

Not tested by Consumer Reports โ€” but it does use ISO-accredited labs. What "third-party tested" actually means, and why it isn't the same as certified.

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Is NOW Sports Whey Safe?

Independent Labdoor testing found lead, arsenic, cadmium and mercury all undetected. Informed Sport certified every batch. The most underrated safe whey on the market.

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Is Transparent Labs Whey Safe?

Informed Choice certified with public lot-matched COAs โ€” you can look up your exact tub. Lead 87% of CR’s level of concern. The honest catch: 2.4ร— the price of ON Gold Standard.

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Is MyProtein Impact Whey Safe?

Independent lab results look clean โ€” but MyProtein's parent paid $198,000 to settle a Prop 65 lead case in 2020. Both halves of the story.

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Is Sunwarrior Protein Safe?

Sunwarrior admits its plant protein contains heavy metals โ€” then won't publish the numbers. Why "68% less lead than an avocado" doesn't hold up, and why Warrior Blend beats Classic.

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Is Legion Whey+ Safe?

Labdoor found lead, arsenic, cadmium and mercury all non-detect โ€” but despite the marketing, Whey+ is not NSF Certified for Sport.

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Is Thorne Whey Isolate Safe?

NSF Certified for Sport โ€” every production lot tested for heavy metals and 290+ banned substances. Consumer Reports never tested it, but this covers more ground.

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๐Ÿ’ช Creatine Purity

Is BulkSupplements Creatine Safe?

NSF Certified for Sport, roughly $0.13 per serving, and still the easiest clean-creatine buy for most people. The straight verdict.

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Is NOW Sports Creatine Safe?

Informed Choice certified, budget-friendly, and stocked almost everywhere. The best mainstream middle-ground pick.

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Is Myprotein Creapure Safe?

For buyers who want German Creapure without paying top-shelf premium prices, this is the sweet-spot play.

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Is Muscle Feast Creapure Safe?

A premium verified Creapure option for long-term purity-focused buyers who do not mind paying more.

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Momentous Dropped Creapureยฎ โ€” What Replaced It?

Scoop: Momentous quietly stopped using Creapureยฎ in June 2026. Its replacement, "Signature Spec," is a standard the company wrote itself โ€” but submitted to more independent testing than before. The honest breakdown.

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Is Thorne Creatine Safe? (And Why It's Not Creapure)

NSF Certified for Sport โ€” every production lot tested for heavy metals and 290+ banned substances. But Thorne is not a Creapureยฎ product, despite what most sites claim. Plus the honest price verdict.

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Best Clean Creatine 2026

Complete guide to 15+ NSF verified brands. Avoid DCD and DHT contaminants.

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Full Creapureยฎ Brand List

Every brand using the gold-standard German creatine monohydrate.

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The DCD Cyanide Risk

How cheap creatine synthesis can lead to toxic byproduct contamination.

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โš–๏ธ Brand Showdowns

Premier vs. Muscle Milk

Safety, macros, and value. Which RTD shake is actually the better choice?

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Body Fortress vs. ON

Walmart's budget king vs. the world's #1. Is the extra $0.10 worth it?

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Vega vs. Orgain

The two plant-protein giants face off in heavy metal testing results.

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Kirkland vs. Elevation

Costco and Aldi protein powders: Which store-brand is safer?

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๐Ÿ“˜ Life-Stage Safety Guides

Pregnancy Safety Guide

Lead crosses the placenta. Here are the only 3 proteins verified safe for expectant moms.

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Teen Athlete Guide

Growing brains absorb lead faster. How to choose safe protein for student athletes.

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Best for Weight Loss

Verified-safe options with high protein-to-calorie ratios for fat loss.

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Best Protein for Ozempic & GLP-1 Users

74% of protein powders contain dangerous lead levels. Safe picks for Ozempic, Wegovy & Mounjaro usersโ€”plus 3 brands to avoid.

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