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Quick verdict
Optimum Nutrition (ON) Gold Standard 100% Whey is one of the most widely sold whey protein powders, and it is a safe, dependable pick for most people who want an easy protein boost. If you don’t have a milk or soy allergy and you want a trusted brand with lots of flavors, it is worth a look.
Illustrative image.
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What you get
According to the brand’s product page, each serving gives you 24 g of protein and 5.5 g of naturally occurring BCAAs. The protein is a blend of whey protein isolate, whey protein concentrate and hydrolyzed whey protein, with isolate listed first. The product is labeled gluten free and banned-substance tested, which matters if you compete in tested sports.
One scoop is about 30 to 32 g, depending on the flavor, and has around 120 calories. Always check the label on the exact flavor you buy, because the numbers shift slightly between flavors.
Vanilla Ice Cream label shown. Figures vary by flavor, so check the label on your tub.
Who it’s best for
- People who want a simple post-workout shake or a high-protein snack
- Beginners who prefer a well-known brand with thousands of reviews
- Tested athletes who want a banned-substance-tested option
- Anyone who wants a wide choice of flavors
Who should look elsewhere
- Milk allergy: this is a milk product, so it is not for you.
- Soy sensitivity: the vanilla label I checked lists soy lecithin and says “Contains: milk, soy.” Check your flavor’s label.
- Lactose intolerance: it is not a lactose-free product. The Isolate version has less lactose, but check the label.
- Medical conditions: if you have kidney disease or any condition that affects protein intake, are pregnant or breastfeeding, or take medication, talk to a doctor first.
Flavors: where to start
Retail and review sources list roughly 20 or more flavors, and the lineup changes over time, so check the current list before you order. Flavors the brand’s own site shows include Double Rich Chocolate, Vanilla Ice Cream, Extreme Milk Chocolate, Cookies & Cream, Mocha Cappuccino, Chocolate Mint, Banana Cream and Strawberry Banana. There is also a Naturally Flavored version in chocolate and vanilla.
My tip: buy the smallest tub first. Taste is personal, and the smaller size lets you try a flavor before you commit to a 5 lb tub. Chocolate and vanilla are the usual safe picks, and they are also the easiest to mix into oatmeal, coffee or smoothies.
Illustration, not actual packaging.
Which size should you buy?
The common sizes are 2 lb, 5 lb and, at warehouse clubs, a 5.64 lb bag. Larger sizes usually cost less per serving, but only if you will finish them before the best-by date.
- 2 lb: best for a first try or a new flavor
- 5 lb: best if you already know you like it and use it most days
- Bulk bag: best only if you buy it at a store that sells it, and you are certain about the flavor
How to compare price per serving
Prices change daily, so I don’t list one here. Use this simple math instead:
- Find the total price.
- Find the number of servings per container on the label or listing (about 73 for a 5 lb tub according to one review, and 80 for the 5.64 lb bag at Costco).
- Divide price by servings.
Compare that number across sizes and sellers, and also check for sales and subscription discounts.
How to avoid fake or old protein powder
- Buy from the brand’s own store, Amazon when the item is sold and shipped by Amazon or the brand, or a major retailer.
- Be suspicious of prices far below everyone else’s.
- Check the seal, the lot code and the best-by date when the tub arrives.
- If something looks off (a broken seal, a strange smell, clumps), don’t use it, and return it.
Gold Standard Whey vs. Gold Standard Isolate
The brand’s Isolate version lists 25 g of protein from whey protein isolate only, and it comes in fewer flavors. The regular Whey is a blend and usually costs less per serving. If you are tracking macros closely or you are sensitive to lactose, the Isolate may suit you better. Otherwise, the regular Whey is the better value for most people.
[Compare Whey and Isolate on Amazon: add your affiliate link]
Frequently asked questions
How much protein is in one scoop? The brand lists 24 g per serving.
Is it a best seller? Several Gold Standard listings on Amazon have carried the #1 Best Seller badge in Sports Nutrition Whey Protein Powders. Rankings change often, so check the current rank on the listing.
Does it contain artificial sweeteners? Most regular flavors list sucralose and acesulfame potassium. The Naturally Flavored version is made without artificial sweeteners. Check the label.
Can I use it every day? Many people use whey daily as part of their protein intake, but your needs depend on your diet, health and goals. If you are unsure, ask a doctor or registered dietitian.
Will it help me lose weight? It can help you reach your protein goals while you manage calories, but no powder causes weight loss by itself.
Final thoughts
Optimum Nutrition Gold Standard Whey is popular for a good reason: it is easy to find, easy to mix, available in many flavors and well known in the sports world. Start with a small tub, check the label for allergens, and compare price per serving before you buy a bigger size.
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Nutrition figures, flavors and sizes vary and can change when a product is reformulated. Check the label on your tub. This article is for general information and is not medical advice.