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Whey Protein Isolate, Pasture Raised, Grass Fed, rBST/rBGH and soy free


Muscle Feast Grass Fed & Hormone Free Whey Isolate contains 21.5g (depends on flavor) of high-quality protein per 24g serving (90% before flavoring). We source our whey protein from dairy cows that are certified to be grass fed and given zero artificial hormones (rBGH &rBST free). This product is undenatured, cold microfiltered, & ultrafiltration processed. It contains 6g of naturally occurring BCAAs per serving and has zero additives or artificial ingredients.

  • rBST/rBGH (Artificial Hormones) FREE:This product is sourced from a country that has banned the use of artificial hormones for bovines
  • VEGETARIAN: Certified to be vegetarian by the American Vegetarian Association.
  • OU-D KOSHER:Certified to meet the standards of the Orthodox Union for Kosher Dairy. 
  • GLUTEN-FREE:Certified to be Gluten-Free by the Gluten-Free Organization. 
  • NATURAL:Our whey protein powders are all natural. We do not use any fillers or artificial ingredients in our whey protein powders.
  • STEVIA SWEETENED:We do not add sugar or artificial sweeteners to our whey protein powders.
  • NO FACTORY FARMED INGREDIENTS:Muscle Feast does not support factory farming and will not use ingredients supplied by organizations practicing factory farming.

*  Grass (Forage) Fed -Grass and forage shall be the feed source consumed for the lifetime of the ruminant animal, with the exception of milk consumed prior to weaning. The diet shall be derived solely from forage consisting of grass (annual and perennial), forbs (e.g., legumes, Brassica), browse, or cereal grain crops in the vegetative {pre-grain) state. Animals cannot be fed grain or grain byproducts and must have continuous access to pasture during the growing season. Hay, haylage, baleage, silage, crop residue without grain, and other roughage sources may also be included as acceptable feed sources.

Routine mineral and vitamin supplementation may also be included in the feeding regimen. If incidental supplementation occurs due to inadvertent exposure to non-forage feedstuffs or to ensure the animal's well-being at all times during adverse environmental or physical conditions, the producer must fully document (e.g., receipts, ingredients, and tear tags) the supplementation that occurs including the amount, the frequency, and the supplements provided.

*If the Chocolate flavor is too chocolaty, we suggest adding more water or milk.


Mix one serving (1 level Scoop) thoroughly into 4 or more ounces of water or beverage of your choice. We do not believe in using fillers in our protein powders; we suggest using milk or milk substitute for better taste.

Protein Profile (Percent of Total Protein):

      • Beta-Lactoglobulin - 52%
      • Alpha-Lactalbumin - 20%
      • Bovine Serum Albumin - 2.0%
      • Immunoglobulin - 4.0%
      • Lactoferrin - <1.0%
      • Lactoperoxidase - <1.0%
      • Glycomacropeptide - 20%

Does not contain any of the following:

      • Soy
      • Gluten
      • Additives
      • Added Sugars
      • Artificial Colors
      • Artificial Flavors
      • Unnecessary Fillers
      • Artificial Sweeteners



Whey Protein Isolate

What is it?

Whey Isolates are 90-98% pure protein that digests and absorbs rapidly and is, gram for gram, one of the highest quality forms of protein available. This level of purity is achieved through a cold, cross-micro and ultra-filtration process that removes the larger, less absorbent protein molecules; while also filtering out fat, lactose, and ash.

What does the research say?

Studies suggest that whey isolates can quickly increase amino acid levels in systemic circulation and stimulate robust increases in protein synthesis; arguably the most important physiological factor in existence when it comes to muscle growth, strength, and recovery.

Who is it best for?

Since whey isolates are low in carbs, lactose-free, fat-free, cholesterol free, and gluten free; it makes it the perfect choice for those watching their calories, low-carb dieters, and lactose intolerant individuals. People who want only the highest quality of proteins should stick with a whey isolate.

How quickly does it digest/absorb and raise amino acid levels?

When consumed, whey isolates elevate amino acid concentrations in the blood above baseline after ~20 minutes and peak out at ~60 minutes, followed by a gradual decline that can last up to 1.5 to 3 hours depending on the dose taken.

When is the best time to take it?

Whey isolate is best taken 30-60 minutes pre-workout and immediately post workout to maximize muscle protein synthesis.  It can also be consumed throughout the day or between meals to meet individual protein requirements.



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Customer Reviews

Based on 875 reviews
Great Staff and Great Products

Had a shipping problem in which USPS was completely at fault, but Muscle Feast was really efficient in resolving the issue. The Muscle Feast staff were nothing short of professional, knowledgeable, and positive. Muscle Feast is a win-win with the best Protein available and a staff to back it up.

Happy customer

Mixes well, good flavor.
I'm happy and will continue to purchase in the future.

Taste is ok and dissolves well

The cappuccino flavor is not all I expected but it’s ok. It dissolves very fast and well.

Good product

Could be a winner. Much better than most stuff out there. The only downside it tends to clump and maybe a little less smooth than the proteins I used to. Otherwise it's perfect.

Whey protein isolate

Great product, fast absorbing protien, that can be taken after meals or anytime of the day. I mix it with the whole oats powder everyday for extra carbs. Excellent blend !