The two tubs side by side
Thorne takes return requests within 60 days, though approved returns carry a 25% restocking fee4. Momentous sweetens its whey with monk fruit and stevia, and its refund policy generally refuses returns of delivered products58. Prices, terms and NSF listings are as published on October 13, 2026.
The versions compared are Thorne’s vanilla tub and Momentous’s chocolate jar, the ones our product reviews cover. Prices are US one-time prices on each maker’s official page, checked on October 13, 2026, before tax and shipping. Nutrition figures marked NSF come from each product’s Certified for Sport listing.
| Question | Thorne Whey Protein Isolate (Vanilla, 30 scoops, SP111) | Momentous Whey Protein Isolate (Chocolate, 25 servings) |
|---|---|---|
| One-time US price | $65, about $2.17 a scoop. No sale, crossed-out or subscription price shown1 | $69.99, about $2.80 a serving. No crossed-out price on Momentous’s online store. The purchase box also showed “Estimated to be back in stock: Soon”5 |
| Subscription | None shown1 | 25% off the first delivery ($52.49), then 10% off ($62.99). The page’s “$2.09/serving” is close to the first-delivery price, not the one-time price5 |
| Protein per scoop | 21 g in Thorne’s headline and NSF’s listing. The supplement facts list 25 g of whey protein isolate, with no explanation12 | 20 g56 |
| Cost per gram of protein | About $0.10, at 21 g a scoop1 | About $0.145 |
| Calories, sugar and fat (NSF) | 100 calories, 3 g carbohydrate, 3 g sugar and 0.5 g fat per 27.9 g scoop2. Thorne’s page doesn’t give these1 | 90 calories, 2 g carbohydrate, under 1 g sugar and 1.5 g fat per 26.2 g scoop6 |
| Ingredients | Whey protein isolate (from milk), a bromelain and papain blend, carboxymethylcellulose gum, xanthan gum, vanilla flavor, evaporated cane juice sugar and rebaudioside A from stevia1 | Grass-fed whey protein isolate, ProHydrolase (an enzyme, Momentous says), natural flavors, cocoa, salt, monk fruit extract and stevia5 |
| Sodium and calcium | 75 mg sodium and 94 mg calcium a scoop1 | Not given on the page or in NSF’s listing56 |
| Directions | 1 scoop a day in at least 8 oz of water, juice or another drink1 | 1 scoop in 10 to 12 fl oz of liquid, as needed5 |
| Net weight | Not stated. NSF lists 29.7 g and 906 g packages, and 30 scoops of 27.9 g would be about 837 g, which matches neither12 | Not stated on the page. NSF lists a 655 g package, which equals 25 scoops of 26.2 g56 |
| NSF Certified for Sport listing | Thorne Whey Protein Isolate Vanilla Flavored, with 23 certified lot numbers. No SKU or certification date shown2 | Essential Grass Fed-Whey Protein Chocolate, lot “All”6. Momentous’s page doesn’t use that name5. NSF also lists a separate Chocolate Fudge whey isolate7 |
| Lead and test results | California Proposition 65 warning about lead, with no amount given. Thorne doesn’t publish its test results on the page1 | Momentous says certificates of analysis are available for every batch and third-party results are published through Light Labs. Those reports weren’t reviewed5 |
| Returns | Return requests within 60 days of purchase. All approved returns carry a 25% restocking fee. Who pays return shipping isn’t stated4 | Delivered products generally can’t be returned, except where the law requires. Shipping isn’t refunded8 |
| Guarantee | 60-Day Satisfaction Guarantee, for a refund or product credit4 | “30 day money back guarantee” on the page, with no terms. The refund policy doesn’t mention it58 |
| A year at 1 scoop a day | $790.831 | $1,021.85, or about $919.65 at the later Subscribe price. Momentous says “as needed,” so a scoop a day is our assumption5 |
| Three-year estimate | $2,437.49: the first tub plus three years of refills, about one tub more than 1,095 scoops need. Tax and shipping excluded1 | $3,135.54 on the same basis at the $69.99 one-time price. Tax and shipping excluded5 |
Which one fits which need
These are picks for different needs, not a ranking. Both give about 20 g of protein from whey isolate in one scoop15. So the choice rests on price, sweetener and returns.
- If you count cost per gram of protein, choose Thorne Whey Protein Isolate. It’s about $2.17 a scoop and $0.10 a gram of protein1. Thorne also takes return requests within 60 days4. The catch: it has 3 g of sugar a scoop, per NSF, and approved returns carry a 25% restocking fee24.
- If you’d rather skip added cane sugar, choose Momentous Whey Protein Isolate. It’s sweetened with monk fruit extract and stevia, and NSF’s listing gives under 1 g of sugar a scoop56. The catch: it’s about $2.80 a serving, and the jar holds 25 servings, not 305. Its refund policy also says delivered products generally can’t be returned8.
- If you want a lot number to check, Thorne is the one. NSF lists 23 lot numbers for Thorne’s vanilla powder, while the Momentous listing covers all lots26.
What actually differs
Sugar and sweeteners. Thorne uses evaporated cane juice sugar and rebaudioside A from stevia1. NSF’s listing gives 3 g of sugar a scoop, which Thorne’s own page doesn’t state12. Momentous uses monk fruit extract and stevia, and NSF’s listing gives under 1 g of sugar56.
Price. At one-time prices, Thorne is about $2.17 a scoop and Momentous about $2.8015. A year at a scoop a day comes to $790.83 for Thorne and $1,021.85 for Momentous15. Momentous’s later Subscribe deliveries at $62.99 bring its year to about $919.655. Thorne shows no subscription price1.
Disclosure. Thorne’s page lists sodium and calcium but leaves out calories, sugar and fat, which appear only in NSF’s listing12. Its headline says 21 g of protein, while its supplement facts list 25 g of whey protein isolate1. Momentous says its whey comes from pasture-raised, grass-fed European cows not treated with hormones such as rBST5. Neither page states the net weight15.
Returns. Thorne takes return requests within 60 days, but all approved returns carry a 25% restocking fee4. Momentous’s refund policy generally refuses returns of delivered products8. Its page advertises a 30-day money-back guarantee, but gives no terms, and the refund policy doesn’t mention it58.
What stays the same
Both are whey protein isolates, so both are milk proteins and wrong for anyone with a milk allergy15. Both appear in NSF’s Certified for Sport database, and each brand has more flavors listed there37. Both are mixed into a drink and need no equipment15.
Both makers’ quality statements are their own. Thorne says it tests each ingredient for contaminants such as heavy metals, pesticides and harmful microbes1. It doesn’t publish those results on the page1. Momentous says a batch that fails NSF testing doesn’t ship5.
What the labels don’t settle
A sport certification describes what’s in the tub, not what it does for your health. Thorne says its NSF mark means testing for label claims and for nearly 300 banned substances1. Momentous says the program verifies label accuracy and screens for banned substances5. Neither is a test of a health effect.
A 2018 meta-analysis pooled 49 randomized trials with 1,863 healthy adults doing resistance training for at least 6 weeks9. Added protein gave about 0.30 kg more fat-free mass (95% CI 0.09 to 0.52) than training without it9. Total protein intakes above about 1.6 g per kg of body weight a day gave no further gain in fat-free mass9. Neither product was tested in those trials.
Sources
- Whey Protein Isolate - Vanilla (SP111) Thorne · manufacturer
- Certified for Sport listing: Thorne Whey Protein Isolate Vanilla Flavored NSF · certifier
- Certified Products Results: Thorne NSF · certifier
- Returns and Exchanges Thorne · manufacturer
- Grass-Fed Whey Protein Isolate Powder (Whey Protein Isolate) Momentous · manufacturer
- Certified for Sport listing: Essential Grass Fed-Whey Protein Chocolate (Momentous) NSF · certifier
- Certified Products Results: Momentous NSF · certifier
- Refund policy Momentous · manufacturer
- A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults British Journal of Sports Medicine, 2018 · meta-analysis
How this was written. Written from the sources listed above, checked . It is general information, not medical advice. Talk to a clinician before acting on anything here if you have a health condition or take medication.
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