--- canonical: "https://www.supplementmath.com/protein-powder/learn/certifications-lead-limits/" html: "https://www.supplementmath.com/protein-powder/learn/certifications-lead-limits/" markdown: "https://www.supplementmath.com/protein-powder/learn/certifications-lead-limits/index.md" --- Share: [Share on X](https://twitter.com/intent/tweet?text=Which%20Protein%20Powder%20Certifications%20Test%20for%20Lead%3F%20Limits%20Compared&url=https%3A%2F%2Fwww.supplementmath.com%2Fprotein-powder%2Flearn%2Fcertifications-lead-limits%2F) [Share on Facebook](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fwww.supplementmath.com%2Fprotein-powder%2Flearn%2Fcertifications-lead-limits%2F) [Share on LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fwww.supplementmath.com%2Fprotein-powder%2Flearn%2Fcertifications-lead-limits%2F) # Which Certifications Test for Lead? Limits Compared Third-party certifications test for lead, but their limits vary dramatically. NSF allows 20x more lead than California Prop 65. See where tested products fall relative to each certification's lead limits. ## Certification Lead Limits | Certification | Lead Limit | vs Prop 65 | Products Passing | | --- | --- | --- | --- | | California Prop 65 | 0.5 µg/day | 1x \(benchmark\) | 9/15 tested | | NSF Certified for Sport | ≤10 µg/day | 20x higher | 15/15 tested | | Informed Sport/Choice | Not specified | Unknown | — | 🇺🇸 United States • 23 Products \(incl. NSF-only\) Lead content per serving. Lower = safer | Product | Brand | Lead per serving | Lead per 100g protein | Concern | | --- | --- | --- | --- | --- | | Sports Whey Protein Powder | Kinetica | ≤10 µg \(NSF limit; no independent test\) | Not tested | Not independently tested | | Sports Whey Protein Powder | Kinetica | ≤10 µg \(NSF limit; no independent test\) | Not tested | Not independently tested | | Sports Whey Protein Powder | Kinetica | ≤10 µg \(NSF limit; no independent test\) | Not tested | Not independently tested | | Sports Whey Protein Powder | Kinetica | ≤10 µg \(NSF limit; no independent test\) | Not tested | Not independently tested | | [Gold Standard 100% Whey Protein Powder](https://www.supplementmath.com/protein-powder/us/optimum-nutrition/gold-standard-100-whey-protein-powder-vanilla-ice-cream-b07ctwp576/index.md) | Optimum Nutrition | ≤10 µg \(NSF limit; no independent test\) | Not tested | Not independently tested | | [Gold Standard 100% Whey Protein Powder](https://www.supplementmath.com/protein-powder/us/optimum-nutrition/gold-standard-100-whey-protein-powder-vanilla-ice-cream-b000giqt3i/index.md) | Optimum Nutrition | ≤10 µg \(NSF limit; no independent test\) | Not tested | Not independently tested | | [Whey Protein Isolate](https://www.supplementmath.com/protein-powder/us/thorne/whey-protein-isolate-vanilla-b0797b27fw/index.md) | Thorne | ≤10 µg \(NSF limit; no independent test\) | Not tested | Not independently tested | | [Whey Protein Isolate](https://www.supplementmath.com/protein-powder/us/thorne/whey-protein-isolate-chocolate-b07978mbrm/index.md) | Thorne | ≤10 µg \(NSF limit; no independent test\) | Not tested | Not independently tested | | [Vegan Mass](https://www.supplementmath.com/protein-powder/us/naked/vegan-mass-vanilla-b083vtwmp8/index.md) | NAKED | 7.7 µg/serving | 15.4 µg/100g protein | Avoid | | [Black Edition](https://www.supplementmath.com/protein-powder/us/huel/black-edition-chocolate-b0bf5std3j/index.md) | Huel | 6.3 µg/serving | 15.8 µg/100g protein | Avoid | | [Sport Organic Plant-Based Protein](https://www.supplementmath.com/protein-powder/us/garden-of-life/sport-organic-plant-based-protein-vanilla-b01n7dtd98/index.md) | Garden of Life | 2.8 µg/serving | 9.3 µg/100g protein | High | | [Vegan Protein Powder](https://www.supplementmath.com/protein-powder/us/momentous/vegan-protein-powder-chocolate-b0f141v985/index.md) | Momentous | 2.4 µg/serving | 11.9 µg/100g protein | High | | [Organic Vegan Protein Powder](https://www.supplementmath.com/protein-powder/us/orgain/organic-vegan-protein-powder-vanilla-b00j074w7q/index.md) | Orgain | 0.7 µg/serving | 3.4 µg/100g protein | Moderate | | [Mass Gainer](https://www.supplementmath.com/protein-powder/us/transparent-labs/mass-gainer-vanilla-b0fc6wjkwp/index.md) | Transparent Labs | 0.7 µg/serving | 1.3 µg/100g protein | Moderate | | [Gold Standard 100% Whey Protein Powder](https://www.supplementmath.com/protein-powder/us/optimum-nutrition/gold-standard-100-whey-protein-powder-double-rich-chocolate-b002dyizh6/index.md) | Optimum Nutrition | 0.3 µg/serving | 1.2 µg/100g protein | Low | | [Gold Standard 100% Whey Protein Powder](https://www.supplementmath.com/protein-powder/us/optimum-nutrition/gold-standard-100-whey-protein-powder-double-rich-chocolate-b000qsnygi/index.md) | Optimum Nutrition | 0.3 µg/serving | 1.2 µg/100g protein | Low | | [Gold Standard 100% Whey Protein Powder](https://www.supplementmath.com/protein-powder/us/optimum-nutrition/gold-standard-100-whey-protein-powder-double-rich-chocolate-b000giqt2o/index.md) | Optimum Nutrition | 0.3 µg/serving | 1.2 µg/100g protein | Low | | [Prime Protein Powder](https://www.supplementmath.com/protein-powder/us/equip/prime-protein-powder-chocolate-b013mrppl6/index.md) | Equip | 0.3 µg/serving | 1.3 µg/100g protein | Low | | [Grass-Fed Whey Protein Isolate](https://www.supplementmath.com/protein-powder/us/muscle-feast/grass-fed-whey-protein-isolate-unflavored-b01maw94oi/index.md) | Muscle Feast | \<0.01 µg/serving | \<0.01 µg/100g protein | Low | | [Grass-Fed Whey Protein Isolate](https://www.supplementmath.com/protein-powder/us/muscle-feast/grass-fed-whey-protein-isolate-unflavored-b01maw6yu1/index.md) | Muscle Feast | \<0.01 µg/serving | \<0.01 µg/100g protein | Low | | [Grass-Fed Whey Protein Isolate](https://www.supplementmath.com/protein-powder/us/transparent-labs/grass-fed-whey-protein-isolate-chocolate-b0cq32d39x/index.md) | Transparent Labs | \<0.01 µg/serving | \<0.01 µg/100g protein | Low | | [Grass-Fed Whey Protein Isolate](https://www.supplementmath.com/protein-powder/us/transparent-labs/grass-fed-whey-protein-isolate-chocolate-peanut-butter-b0cq3mqr7c/index.md) | Transparent Labs | \<0.01 µg/serving | \<0.01 µg/100g protein | Low | | [Grass-Fed Whey Protein Isolate](https://www.supplementmath.com/protein-powder/us/transparent-labs/grass-fed-whey-protein-isolate-vanilla-b0cq3jtr6f/index.md) | Transparent Labs | \<0.01 µg/serving | \<0.01 µg/100g protein | Low | Lower values = safer. Bars are color-coded by concern level. NSF Certified \(≤10µg, no independent testing\) ## Where Products Fall by Standard ### California Prop 65 \(0.5 µg/day limit\) 9 Would Pass 6 Would Fail 143 Not Tested Products above this limit would require warning labels in California. ### NSF Certified for Sport \(10 µg/day limit\) 15 Would Pass 0 Would Fail 143 Not Tested NSF allows 20x more lead than Prop 65 — "passing" products may still contain significant lead. ## Key Takeaways ### Certification ≠ Low Lead NSF certification does not guarantee low lead. NSF allows 20x more lead than Prop 65. Many certified products would require warning labels in California. ### Prop 65 is the Strictest Standard California's Proposition 65 sets 0.5 µg/day for lead — the strictest limit in the United States and our benchmark for "low concern" products. ### Most Products Are Untested 143 of 158 products in our database have no independent lead testing data. ## Recommendation If lead is your primary concern: Look for products below 0.5 µg/serving. Don't assume certification means low lead — check the actual test data. If athlete certification is your priority: NSF or Informed Sport is valuable for banned substance testing, but be aware their lead limits are higher than Prop 65. Data Sources: Consumer Reports 2025, Labdoor, Clean Label Project. Certification lead limits are obtained from publicly available standards and organization documentation. [Browse Certified Products](https://www.supplementmath.com/protein-powder/us/index.md) ## Related Articles - [Most Lead in Protein Powder: Tested Products Ranked →](https://www.supplementmath.com/protein-powder/learn/most-lead-in-protein-powder/index.md) - [Lead in Protein Powder: Testing Data & Health Risks →](https://www.supplementmath.com/protein-powder/learn/lead-in-protein-powder/index.md) - [Protein Powder Certifications Explained →](https://www.supplementmath.com/protein-powder/learn/protein-certifications-explained/index.md) ## Frequently Asked Questions ### Which protein powder certification has the strictest lead limit? California Prop 65 has the strictest verified lead limit at 0.5 µg/day. NSF Certified for Sport allows up to 10 µg/day — 20x higher than Prop 65. The Clean Label Project Purity Award indicates products are tested for contaminants, but their specific lead limit is not publicly documented. ### How many products pass NSF lead limits? 15 out of 15 tested products \(100%\) would pass NSF's lead limit of 10 µg/day. 0 products \(0%\) would fail, and 143 products have not been tested for lead. ### How many products pass California Prop 65 lead limits? 9 out of 15 tested products \(60%\) meet California Prop 65's lead limit of 0.5 µg/day. 6 products \(40%\) exceed the limit and would require warning labels in California. ### Does NSF certification mean low lead? Not necessarily. NSF allows up to 10 µg/day of lead — 20x California Prop 65's 0.5 µg/day limit. Many NSF-certified products contain significantly more lead than Prop 65 allows. Always check actual test data when available. ## Structured data ```json { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.supplementmath.com/" }, { "@type": "ListItem", "position": 2, "name": "Protein Powder", "item": "https://www.supplementmath.com/protein-powder/" }, { "@type": "ListItem", "position": 3, "name": "Learn", "item": "https://www.supplementmath.com/protein-powder/learn/" }, { "@type": "ListItem", "position": 4, "name": "Certifications Lead Limits" } ] } { "@context": "https://schema.org", "@type": "Article", "headline": "Which Protein Powder Certifications Test for Lead? Limits Compared", "description": "NSF, Informed Sport, Informed Choice, CLP - which certifications actually test for lead? Interactive chart shows where products fall relative to each certification's lead limits.", "datePublished": "2026-08-28", "dateModified": "2026-02-05T00:00:00.000Z", "author": { "@type": "Organization", "name": "SupplementMath", "url": "https://www.supplementmath.com/protein-powder/learn/about" }, "publisher": { "@type": "Organization", "name": "SupplementMath", "logo": { "@type": "ImageObject", "url": "https://www.supplementmath.com/og-image.png" } } } { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Which protein powder certification has the strictest lead limit?", "acceptedAnswer": { "@type": "Answer", "text": "California Prop 65 has the strictest verified lead limit at 0.5 µg/day. NSF Certified for Sport allows up to 10 µg/day — 20x higher than Prop 65. The Clean Label Project Purity Award indicates products are tested for contaminants, but their specific lead limit is not publicly documented." } }, { "@type": "Question", "name": "How many products pass NSF lead limits?", "acceptedAnswer": { "@type": "Answer", "text": "15 out of 15 tested products (100%) would pass NSF's lead limit of 10 µg/day. 0 products (0%) would fail, and 143 products have not been tested for lead." } }, { "@type": "Question", "name": "How many products pass California Prop 65 lead limits?", "acceptedAnswer": { "@type": "Answer", "text": "9 out of 15 tested products (60%) meet California Prop 65's lead limit of 0.5 µg/day. 6 products (40%) exceed the limit and would require warning labels in California." } }, { "@type": "Question", "name": "Does NSF certification mean low lead?", "acceptedAnswer": { "@type": "Answer", "text": "Not necessarily. NSF allows up to 10 µg/day of lead — 20x California Prop 65's 0.5 µg/day limit. Many NSF-certified products contain significantly more lead than Prop 65 allows. Always check actual test data when available." } } ] } ```