The Best Casein Soy Free - December 2022

Based on the analysis of 22,636 reviews.



PROMIX Micellar Casein Protein Powder product image


NAKED CASEIN 1LB Preservative Stimulate product image


Smart%C2%B9%C2%B3%E2%81%B8 Concentrate Grass Fed Gluten Free Unflavored product image


Top Choice Best Value
Kirkman Vitamin E 100 IU Hypoallergenic 100 Vegetarian Capsules Supports Immune System Gluten product image


Best Seller
Protein Chocolate Truffle Serving Friendly product image


PeptoPro Hydrolyzed Caseinate Unflavored Unsweetened 100 Milk Casein Protein Powder Peptides product image


BioTrust Low Carb Natural and Delicious Protein Powder Whey and Casein Blend from Grass Fed product image


MICELLAR CASEIN PROTEIN FRANCE Preservative product image


NUTRITION STANDARD Micellar Digesting Overnight product image


Protein Isolate Undenatured Lactose Vanilla product image

Top Casein Soy Free Brands

Optimum Nutrition

Optimum Nutrition, Inc. (ON) is a wholly owned subsidiary of Glanbia, a top international cheese and nutritional ingredients group. ON owns and operates two top sports nutrition brands, including Optimum Nutrition and ABB Performance, supplying a comprehensive lineup of products across multiple classes.   With state-of-the-art production facilities in three countries, ON is the sole sports nutrition company to manufacture items in every merchandise group. Whether it's nutritional supplements, protein powders, ready-to-drink shakes and energy formulas, or minerals and vitamins, Optimum Nutrition requires a hands-on approach to maintaining the very highest standards.

Optimum Nutrition was established in 1986 to meet consumer demand for consistent quality in sport nutrition. The company is also known for innovation, being first to create a casein protein powder, and first to provide an all-micellar casein formula.   ON's  industry leadership can also be viewed in the dominance of Gold Standard 100 percent Whey, universally known as the planet's best-selling whey protein.  

See all Optimum Nutrition products

ProMix Nutrition

Constructed for professional athletes, ProMix surpasses all testing criteria for purity and functionality.

ProMix Whey comes from the milk of grass-fed cows. Cold-processed microfiltration creates a non-denatured whey protein with superior bioavailability and an unsurpassed amino acid profile, rich in naturally occurring immuno-globulins, lactoferrin, CLAs and development variables.  

  • No Growth Hormones
  • No Artificial Flavors, Colors, or Sweeteners
  • No Soy or Gluten
  • Third-Party Independent Testing
  • No GMO Ingredients
  • No Antibiotics

See all ProMix Nutrition products