Thorne Whey Protein Isolate review

Thorne's whey is a whey protein isolate, so each 100-calorie scoop carries 21 g of protein with 3 g of sugar and 0.5 g of fat. Thorne lists 2.2 g of leucine per serving and adds a bromelain and papain blend to help digest the protein. The main reason it ranks first is testing: the product is NSF Certified for Sport, which Thorne describes as batch testing for label accuracy and for nearly 300 substances banned by major athletic bodies. That matters to college and pro athletes and to anyone who wants an outside check on what they eat every day. At $65 for 30 scoops, or $58.50 on subscription, the cost per serving sits in the middle of this list. The vanilla formula is not the simplest: it uses carboxymethylcellulose and xanthan gums, cane juice sugar and stevia. The page also carries a California Proposition 65 warning for lead. Bulk tubs and single-serve packets are both sold.

Who it is for

Lifters and tested athletes who want an NSF Certified for Sport whey at a mid-range price.

Price

$65 for 30 scoops, or $58.50 with a subscription.

$65 /30 Scoop(s)
Quoted from the vendor pricing page on November 9, 2026.

Key features

• NSF Certified for Sport
• 21 g of whey protein isolate per scoop
• 2.2 g of leucine per serving
• 100 calories, 3 g sugar and 0.5 g fat per serving
• Bromelain and papain enzyme blend

Strengths and weaknesses

• Strength: Batch testing for label claims and nearly 300 banned substances under NSF Certified for Sport
• Strength: Isolate form with low fat and sugar per serving
• Strength: Sold in bulk powder or single-serving packets
• Weakness: Vanilla contains gums and evaporated cane juice sugar
• Weakness: 21 g per scoop is lower than Naked, Dymatize or Vega
• Weakness: Carries a California Proposition 65 lead warning

Key facts

• Price: $65 for 30 scoops
• Protein per serving: 21 g
• Protein type: Whey isolate
• Testing: NSF Certified for Sport
• Subscription: $58.50, 10% off

Where it ranks

Thorne Whey Protein Isolate is No. 1 in our Best Protein Powders verdict.