Our protein pick
Thorne Whey Protein Isolate
Vanilla, 30 scoops (SKU SP111)
$65US price, checkedNSF-listed vanilla whey isolate at about $2.17 a scoop
Check price at Thorne for Thorne Whey Protein Isolate Full review →SIDE BY SIDE
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Protein
Momentous Whey Protein Isolate
Chocolate, 25-serving jar, 20 g protein per serving
$69.99US price, checkedNSF-listed chocolate whey isolate with 20 g protein, about $2.80 a serving
Check price at Momentous for Momentous Whey Protein Isolate Full review →| Criterion | Thorne Whey Protein Isolate | Momentous Whey Protein Isolate |
|---|---|---|
| US price | $65Checked Oct 13, 2026 · Price details in the review | $69.99Checked Oct 13, 2026 · Price details in the review |
| Three-year ownership estimate | $2,437.49 Planning total. | $3,135.54 Planning total. |
| Choose if | A drug-tested athlete who wants a vanilla whey isolate listed in NSF's Certified for Sport database and will check the tub's lot number against NSF's list. | A drug-tested athlete who wants a batch-certified chocolate whey isolate and doesn't mind paying for it. |
| Main trade-off | It costs about $2.17 a scoop and contains cane sugar (3 g a scoop, per NSF) and milk-derived protein, while Thorne's page leaves out calories, sugar grams and net weight. | It costs about $0.14 per gram of protein at the one-time price, and the refund policy generally refuses returns. |
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| Exact variant | Vanilla, 30 scoops (SKU SP111) | Chocolate, 25-serving jar, 20 g protein per serving |
| Dimensions | Thorne doesn't state the container's size or net weight. The product page gives only 30 one-scoop servings. NSF's listing gives a 27.9 g serving. It also lists package sizes of 29.7 g and 906 g but doesn't say which one matches the 30-scoop container. At 27.9 g a serving, 30 servings would come to about 837 g, which matches neither. | The jar holds 25 servings. Momentous's page text doesn't give the net weight or jar dimensions. NSF's listing for the Chocolate powder gives a 26.2 g scoop and package sizes of 26.2 g, 262 g and 655 g. The 655 g size works out to 25 scoops. |
| Installation | Nothing to install. Thorne's directions are to mix 1 scoop a day into at least 8 ounces of water, juice or another drink, or to use it as a health-care practitioner recommends. | Nothing to install. Momentous says to mix 1 scoop with 10 to 12 fluid ounces of liquid, as needed. |
| Materials | Whey protein isolate, which is derived from milk, plus a bromelain and papain enzyme blend. The other ingredients are carboxymethylcellulose gum, xanthan gum, vanilla flavor, evaporated cane juice sugar and rebaudioside A (from stevia). Thorne labels it gluten free and soy free. Thorne doesn't say what the container is made of. | Momentous lists the Chocolate flavor's ingredients as grass-fed whey protein isolate, ProHydrolase, natural flavors, cocoa, salt, monk fruit extract and stevia. Momentous calls ProHydrolase an enzyme. It says the whey comes from European cows that are pasture-raised, grass-fed and not treated with hormones such as rBST. Whey is a milk protein. The page doesn't say what the jar is made of. |
| Warranty | Thorne doesn't state a product warranty. Its returns page describes a 60-day satisfaction guarantee (see returns). | Momentous doesn't state a warranty. The product page advertises a "30 day money back guarantee" but doesn't give its terms, and the refund policy doesn't mention it. |
| Returns | Thorne's returns page says that if you're not satisfied, you can request a return within 60 days of the date of purchase from Thorne. All approved returns carry a 25% restocking fee. A separate answer on the same page describes Thorne's 60-Day Satisfaction Guarantee. If you bought from an authorized reseller, you can return the product there for your money back, a store credit or a replacement. If you bought from Thorne's website or an authorized US seller and couldn't reach a satisfactory resolution with the seller, you can call Customer Service. You can ask for a refund or a product credit, but the request must be made within 60 days of the date of purchase. Thorne generally doesn't refund or exchange product past its expiration date. For an opened product a practitioner won't take back, the page only says to call Customer Service, which will "do our best to accommodate your situation." Customer Service is at 800-228-1966 (Monday to Friday, 8 a.m. to 8 p.m. ET) and support@thorne.com. The page doesn't say who pays return shipping. | The store's refund policy says Momentous generally doesn't accept returns of delivered products, except where applicable law requires it. The reason given is that it can no longer guarantee how they were stored. Original and return shipping aren't refundable unless the law requires otherwise. The policy says it doesn't limit your rights under consumer protection laws. You generally have at least 60 minutes after ordering to make changes. If you bought from a retailer, returns go back to that retailer. The policy doesn't mention the 30-day money-back guarantee shown on the product page. |
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These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.