Black cylindrical tub of Onnit grass-fed whey isolate protein powder in Mexican chocolate flavor with black screw-top lid.
Tan-colored whey protein powder in a circular pile against a gray background with benefit claims below.
Two black protein powder tubs labeled Grass-Fed Whey Isolate Protein in vanilla and chocolate flavors.
Man in gym attire holding blue shaker bottle with grass fed whey protein tub beside him on bench.
Grass Fed Whey Isolate Protein - Mexican Chocolate (30 Serving Tub)

Onnit Whey Isolate

Whey isolate with a complete amino acid profile

Size
30-day money back guarantee
HSA/FSA eligible. Save on average of 30%. Learn More

With 20 grams of fast-absorbing non-GMO whey isolate from the milk of dairy cows fed a diet of at least 70% grass-based feed, this protein supports muscle growth, recovery, and lean body mass—without the extra fat and carbs found in concentrate.†

High in leucine, a key amino acid that helps trigger muscle protein synthesis, this formula delivers fast fuel to your muscles when they need it most. Ideal for athletes and active lifestyles, it supports recovery between workouts.†
  • HSA/FSA ELIGIBLE
  • COA Tested
  • IGEN™ Non-GMO
  • GRASS-FED WHEY
  • 20G PROTEIN

Science Backed Ingredients

Grass-Fed Whey Isolate Protein

Supports Muscle Growth & Recovery†

Better Together

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Onnit Whey Isolate
Whey isolate with a complete amino acid profile
Mexican Chocolate–30 Servings

$59.95

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Creatine
Build Muscle. Support Muscle Recovery While Working Out. Fuel Your Brain.†
Unflavored–90 Servings

$37.99

Pair Your Protein With Creatine

Onnit Whey Isolate gives you 20g of grass-fed whey protein per serving, with a complete amino acid profile. Pair it with Onnit Creatine, which helps build lean muscle† and promotes strength and power.† Creatine also supports muscle recovery while working out.†