Transparent Labs vs Optimum Nutrition Whey (2026): Compared
Informed Choice lists both product lines. Transparent Labs French Vanilla is also NSF Certified for Sport, in the same 30-serving pack we price. NSF Certified for Sport lists Gold Standard Double Rich Chocolate in the 10 lb tub only; the 5 lb tub we price is not on that list. So the choice is about what is in the tub and what you pay. Transparent Labs is all whey isolate, 28 g of protein per scoop, sweetened with stevia, and the brand says you can match your lot number to a lab report. Gold Standard is a whey blend with 24 g per scoop and costs less: Gold Standard is 25% cheaper per 25 g of protein ($1.45 vs $1.93). Pay for Transparent Labs if you want isolate, stevia and lot reports; buy Gold Standard if cost per gram matters most.
Informational comparison of label data, registry listings and cost, not medical advice.
The numbers, side by side
| Transparent Labs | Gold Standard | |
|---|---|---|
| Protein type | Whey isolate only (grass-fed) | Blend: whey isolate, whey concentrate, hydrolyzed whey |
| Protein per scoop | 28 g (34.3 g scoop) | 24 g (31 g scoop) |
| Protein share of the scoop | 82% | 77% |
| Calories per scoop | 130 | 120 |
| Total fat | 0.5 g | 1.5 g |
| Total carbs | 1 g | 3 g |
| Total sugars | 1 g | 1 g |
| Sweetener (this flavor) | Stevia | Acesulfame potassium |
| NSF Certified for Sport | Listed (French Vanilla, the 30-serving pack priced here) | Not for the 5 lb tub. NSF lists Double Rich Chocolate in the 10 lb tub only |
| Informed Choice | Product line listed ("Whey Protein Isolate", no flavors) | Product line listed ("ON Gold Standard 100% Whey", no flavors) |
| Lab reports by lot | Brand says you can match your lot number on its site | No public lot reports found |
| Servings per tub | 30 | 74 |
| Price | $64.99 | $102.81 |
| Cost per scoop | $2.17 | $1.39 |
| Cost per 25 g protein | $1.93 | $1.45 |
| Buy | Check price → | Check price → |
Protein, scoop size, calories, fat, carbs, sugars and sweeteners are from each brand’s Nutrition Facts panel for the flavor priced. The tubs are different sizes; cost per 25 g of protein is the fair comparison. Informed Choice lists product lines, not flavors or pack sizes. NSF lists products by flavor and pack, and we count an NSF listing only when it covers the pack we link.
The real difference: isolate and lot reports vs cost
Informed Choice lists both product lines, so neither is the "untested" option. The difference is what you get per scoop and what you pay for it. Transparent Labs uses only whey isolate, which is filtered further than concentrate, so a larger share of each scoop is protein (82% vs 77%). It is sweetened with stevia, and the brand says you can look up the lab report for the lot you bought. Gold Standard is a blend that includes whey concentrate and costs 25% less per gram of protein at the Amazon prices we recorded on September 30, 2026.
NSF listings are per flavor and pack. NSF Certified for Sport lists Transparent Labs’ whey isolate in many flavors, including the 30-serving French Vanilla pack priced here. It lists Gold Standard 100% Whey in only Double Rich Chocolate and Vanilla Ice Cream, both in the 10 lb tub only. If you need an NSF-listed product, check the flavor and size before you order; our third-party tested protein list shows every listed powder we found.
Who each one is for
Choose Transparent Labs if you want an all-isolate powder, a stevia-sweetened label, or a lab report you can match to your tub.
Choose Gold Standard if you want the lower cost per gram of protein and are fine with a whey blend. If you need NSF Certified for Sport, NSF lists only the 10 lb Double Rich Chocolate and Vanilla Ice Cream tubs, not the 5 lb tub linked here.
Frequently asked questions
Is Transparent Labs or Optimum Nutrition better?
It depends on what you are paying for. Transparent Labs is an all-whey-isolate powder with 28 g of protein per scoop, sweetened with stevia, and the brand says you can match your lot number to a lab report on its site. Optimum Nutrition Gold Standard is a whey blend with 24 g per scoop and costs less per gram of protein ($1.45 vs $1.93 per 25 g at the Amazon prices we recorded on September 30, 2026). Informed Choice lists both product lines. Transparent Labs French Vanilla is also NSF Certified for Sport, in the same 30-serving pack we price. NSF Certified for Sport lists Gold Standard Double Rich Chocolate in the 10 lb tub only; the 5 lb tub we price is not on that list.
Which has more protein per scoop?
Transparent Labs has 28 g in a 34.3 g scoop; Gold Standard has 24 g in a 31 g scoop. 82% of the Transparent Labs scoop is protein, vs 77% for Gold Standard.
Why is Transparent Labs more expensive?
Per 25 g of protein, Transparent Labs costs $1.93 and Gold Standard $1.45, about 34% more for Transparent Labs. Transparent Labs is all whey isolate, a more filtered form of whey; Gold Standard is a blend. The tubs are also different sizes: 30 servings of Transparent Labs against a 5 lb tub of Gold Standard.
Are both third-party tested?
Yes. Informed Choice lists both product lines, "Whey Protein Isolate" (Transparent Labs) and "ON Gold Standard 100% Whey", without flavors (list read September 22, 2026). NSF Certified for Sport also lists Transparent Labs Grass-Fed Whey Protein Isolate in French Vanilla and many other flavors, including the 30-serving pack we price. NSF lists Gold Standard Double Rich Chocolate and Vanilla Ice Cream in the 10 lb tub only; the 5 lb tub we price is not on that list. Transparent Labs says you can match your lot number to a lab report on its site.
Which is better if I avoid artificial sweeteners?
Transparent Labs is sweetened with stevia. Gold Standard Double Rich Chocolate uses acesulfame potassium, and some other Gold Standard flavors also use sucralose. Check the label of the exact flavor you buy.
Which tastes or mixes better?
We did not test taste or mixing. This page compares what the labels, the registries and the Amazon prices show.
Related
- Third-party tested protein powder: which are certified
- Optimum Nutrition Gold Standard vs Dymatize ISO100
- Best protein powder, compared
Sources
- Transparent Labs Grass-Fed Whey Protein Isolate, French Vanilla 30 servings Nutrition Facts and third-party test page, transparentlabs.com, read 2026-10-01.
- Optimum Nutrition Gold Standard 100% Whey, Double Rich Chocolate 5 lb Nutrition Facts, optimumnutrition.com, read 2026-10-01.
- NSF Certified for Sport listings 1809884 (Transparent Labs French Vanilla, 1029 g pack) and 1256427 (Gold Standard Double Rich Chocolate, 4.53 kg pack only), nsfsport.com, read 2026-10-01.
- Informed Choice certified products, choice.wetestyoutrust.com/certified-products, list read 2026-09-22.
- Amazon prices recorded 2026-09-30.
As an Amazon Associate we earn from qualifying purchases. We compare by label data, registry status and cost per gram of protein, never commissions.