Does Optimum Nutrition Gold Standard Whey Have Lead? What Testing Shows
Does Optimum Nutrition Gold Standard Whey Have Lead?
Yes, a small amount. Consumer Reports found lead in Optimum Nutrition Gold Standard 100% Whey (Double Rich Chocolate) at 56% of its level of concern per serving, and placed it in its "Better choices for daily consumption" group.
That makes it one of the lower results in a test where most products came in higher. If you are comparing it against our protein powders tested for lead, here is what the result covers and what it does not.
What the testing found
Consumer Reports tested 23 protein powders and shakes for arsenic, cadmium, lead and mercury. It bought multiple samples of each product, including two to four distinct lots, over a three-month period, and sent them to an independent laboratory. Results are averages across those lots.
For Gold Standard 100% Whey, a 30.5 gram scoop measured 56% of CR's level of concern for lead. That level is built on California's Prop 65 maximum allowable dose for lead, 0.5 micrograms a day. CR's guidance for this product is up to 1¾ servings a day.
CR also reported that dairy-based powders generally had the lowest amounts of lead, and that half of the products it tested still had levels high enough to advise against daily use. Gold Standard being a whey powder fits that pattern.
What the result does not cover
CR listed one Gold Standard flavor, Double Rich Chocolate. Cocoa is a known lead accumulator, so a chocolate result says little about the vanilla, strawberry or unflavored versions, in either direction. CR has not published numbers for them that we could find.
The test also reflects lots bought in a single window. A new lot can come in higher or lower, and one test does not show how consistent a brand is from batch to batch.
What Optimum Nutrition publishes
We did not find a lot-level certificate of analysis for lead published by Optimum Nutrition. Retailer listings describe Gold Standard 100% Whey as Informed Choice tested for banned substances. We could not confirm that in the certifier's own database, and Informed Choice is a banned-substances program, not a heavy metals test.
The company states in its own material that ingredients are tested for purity, potency and composition. That is a general quality statement and says nothing specific about lead.
What it means for a buyer
The one independent number we have is a good one for a flavored powder. It is still an average from past lots, so it is not a substitute for a certificate for the tub you are holding, and it was measured on chocolate only. If you drink two scoops a day, CR's 1¾ serving guidance is worth knowing before you do.
If lead is the reason you are shopping, a brand that publishes lot-level results removes the guesswork. These come from our supplements guide, each with a different reason to pick it.
Protein powders with a clearer testing record
- Legion Whey+ Protein, best overall. Grass-fed whey isolate with Informed Sport certification. We cover it in Is Legion Protein Powder Clean?
- Momentous Essential Grass-Fed Whey Protein Isolate, best for batch-level lab results. NSF Certified for Sport, with a two-ingredient label.
- NAKED 100% Grass-Fed Whey Protein Powder, best single-ingredient whey. One ingredient on the label, and NSF Certified.
- Klean Athlete Klean Isolate, best unflavored isolate. Sold unflavored, which sidesteps the cocoa question.
- NAKED Pea Protein Powder, best dairy-free plant option. NSF Contents Certified and a single ingredient. CR found plant-based powders carried more lead on average, so check the certificate for your lot.
- Equip Foods Prime Protein, best beef protein for anyone avoiding dairy. A single-ingredient grass-fed beef protein isolate. See what testing shows for Equip.
For more brand results, see Does Orgain Protein Powder Have Lead? If you want whey only, see the best whey protein without heavy metals.
The takeaway
Consumer Reports put Optimum Nutrition Gold Standard 100% Whey, Double Rich Chocolate, in its better-choices group at 56% of its lead level of concern. It tested one flavor, and the brand does not publish lot-level lead results that we could find. Ask for the certificate for your lot, or choose a powder where it is already public.