Is Optimum Nutrition third party tested?
Partly: 9 of the 12 products we track. Of the 12 Optimum Nutrition products we track across 3 categories, 9 are certified by production batch, which names no package and 3 match a listing not settled either way.
A certifier lists specific packages against each certificate, not a whole brand. So “Optimum Nutrition is third party tested” can be true of one bag while the size, strength or form beside it has no listing. Each row below says which.
Creatine Monohydrate
0 of 6 named at the exact package, 3 certified by batch. Size by size, with what each listing names
| Product | Named by a certifier? | Cost per dose, before delivery | Listing |
|---|---|---|---|
| Micronized Creatine Powder, Unflavored (1.2 kg) buy | Yes, by batch | $0.225 13th cheapest of 58 | Unknown |
| Micronized Creatine Powder, Unflavored (600 g) buy | Yes, by batch | $0.25 20th cheapest of 58 | Unknown |
| Micronized Creatine Powder, Unflavored (300 g) buy | Yes, by batch | $0.341 30th cheapest of 58 | Unknown |
| Micronized Creatine Capsules, Unflavored (300 capsules) buy | Not settled | $0.767 48th cheapest of 58 | Unknown |
| Micronized Creatine Capsules, Unflavored (200 capsules) buy | Not settled | $0.80 50th cheapest of 58 | Unknown |
| Micronized Creatine Capsules, Unflavored (100 capsules) buy | Not settled | $0.92 51st cheapest of 58 | Unknown |
Whey Protein
0 of 4 named at the exact package, 4 certified by batch.
| Product | Named by a certifier? | Cost per dose, before delivery | Listing |
|---|---|---|---|
| Gold Standard 100% Whey, Double Rich Chocolate (10.18 lb) buy | Yes, by batch | $1.61 4th cheapest of 29 | Unknown |
| Gold Standard 100% Whey, Double Rich Chocolate (5.05 lb) buy | Yes, by batch | $1.86 11th cheapest of 29 | Unknown |
| Gold Standard 100% Whey, Double Rich Chocolate (1.98 lb) buy | Yes, by batch | $2.68 24th cheapest of 29 | Unknown |
| Gold Standard 100% Whey, Double Rich Chocolate (0.68 lb) buy | Yes, by batch | $2.76 25th cheapest of 29 | Unknown |
Plant Protein
0 of 2 named at the exact package, 2 certified by batch.
| Product | Named by a certifier? | Cost per dose, before delivery | Listing |
|---|---|---|---|
| Gold Standard 100% Plant Protein, Rich Chocolate Fudge (1.76 lb) buy | Yes, by batch | $2.08 3rd cheapest of 17 | Unknown |
| Gold Standard 100% Plant Protein, Rich Chocolate Fudge (1.06 lb) buy | Yes, by batch | $2.47 9th cheapest of 17 | Unknown |
No listing is an absence in a database, not a failed test: most supplements have never been independently tested. NSF Certified for Sport, the Informed programs' published product lists, the IFOS directory and USP's directory are each read in full. Each product page names the day.
Every category we compare: the home page. Every question we answer: the question index.
What this rests on: prices we last recorded at the retailer named on each product page, which go stale, and each page says when it was checked; the products we track, not every product sold, and Amazon and Walmart are not among the stores; listings and labels read at the source, each linked from the page. Found an error? Tell us. The full method: How we compare.