Optimum Nutrition Gold Standard 100% Whey Review

Optimum Nutrition Gold Standard Whey Protein in Double Rich Chocolate, sold in a 5 pound tub, is presented on this Amazon listing as a 100% whey protein powder that delivers 24 grams of protein per scoop. The product page describes it as Gold Standard whey protein made from whey protein isolate and concentrate, intended to help build and maintain lean muscle when paired with regular resistance training. The listing highlights an anytime formula that the page suggests is suitable after a run or lift, between meals, with a meal, or any time of day when extra protein is needed. Post workout recovery is another stated use, with the page noting 5.5 grams of naturally occurring branched-chain amino acids (BCAAs) and 11 grams of essential amino acids (EAAs) per serving, which it says support recovery and workouts. The page states that the product is banned-substance tested and made by the brand, which it calls the world's number one sports nutrition brand. It also describes an instantized formula that mixes easily without clumps, with the directions being to shake, stir, or blend one scoop with 6 to 8 ounces of water, milk, or another beverage for about 20 seconds. The listing says that for 35 years athletes have trusted Optimum Nutrition to fuel their training, and that the brand's whey is backed by science and trusted by athletes. The specification table lists the flavor as Double Rich Chocolate, the diet type as gluten free, the protein source as whey, protein at 24 grams, and product benefits as muscle growth and weight gain. The page lists 74 total servings per container, an item weight of 5 pounds, a unit count of 80 ounces, and item dimensions of 8 by 8 by 11.25 inches. The package type is listed as a tub, the manufacturer as Glanbia Performance Nutrition, and the recommended use as post-workout. The page also notes a WARNING about choking hazard due to small parts and that the product is not for children under 3 years. The item is sold and shipped by Amazon.com and is listed as non-returnable due to food safety reasons, though damaged or defective items may be refunded or replaced. The listing shows a Subscribe and Save option. The page's own product title is Optimum Nutrition Gold Standard Whey Protein, Double Rich Chocolate, 5 LB, with the subtitle describing 24 grams of 100% whey protein powder per serving, with BCAAs, gluten free, banned substance tested, easy mixing, and muscle support.

Product Focus: Muscle and Strength
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$43

Study, Trial or Testing Result Summary

MembersHuman studies

3 of these 33 human studies gave the ingredient by drip, not by mouth.

This product is mainly a whey protein blend, but the studies we were given cover only the amounts of calcium, iron and potassium on its label, whey itself. Calcium alone did build muscle. …

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Review Totals and Summary

Members103,039 reviews
103,039 reviews · Amazon 100,914 · Optimumnutrition 1,852 · Sam's Club 273

Across the stores, "Optimum Nutrition Gold Standard Whey" has received 101187 ratings, and the themes are drawn from the written reviews that could be read on their pages. A handful of written reviews were visible on one store's page, and these highlight aspects of the protein powder. …

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Biohacker Summary

MembersWhat our biohacker panel says

The panel's main ingredient for this product is potassium, and of the ten about it, with the voices being those who use it or it. Four of them use it through electrolyte drinks, first thing in the morning and around workouts, to stay hydrated and support performance, and one gives amounts of 100 to 200 milligrams per serving alongside sodium and magnesium. …

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RAL Summary

MembersThe tier and why

The grade rests on trace minerals (calcium, iron and potassium) rather than the whey protein that is the main ingredient, so it does reflect the product. …

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Musculoskeletal system. Combine with and possible side are for members.

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Supplement Facts

Calcium 130 mg · Iron 0.7 mg · Potassium 210 mg
Supplement Facts
Serving Size About 1 Scoop (30.4g)
Servings Per Container 29
Amount Per Serving% Daily Value
Calories120
Total Fat1.5 g2%
Saturated Fat0.5 g3%
Cholesterol35 mg12%
Sodium50 mg2%
Total Carbohydrate3 g1%
Dietary Fiber1 g2%
Total Sugars1 g
Protein24 g48%
Calcium130 mg10%
Iron0.7 mg4%
Potassium210 mg4%
* Percent Daily Values are based on a 2,000 calorie diet.

Other ingredients: Protein Blend (Whey Protein Isolate, Whey Protein Concentrate, Whey Peptides), Cocoa Powder (Processed with Alkali), Natural and Artificial Flavor, Acesulfame Potassium, Lactase.

Directions: For best results, mix up your shake 30-60 minutes after you work out, or have it as an anytime snack in your balanced, high-protein diet.

Label source: The Vitamin Shoppe · Report a label change

Where to Buy

Optimum Nutrition · Amazon · Sam's Club
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Our articles on this subject

Graded October 29, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.