The Best Natural Whey Protein - July 2020

Based on the analysis of 58,996 reviews.



Levels Chocolate Cacao Protein Undenatured product image


Top Choice Best Seller
Optimum Nutrition Standard Naturally Flavored product image


Best Value
MET Rx Natural Protein Chocolate Filtered product image


Designer Whey Premium Natural Protein product image


Bodylogix Natural Grass Fed Protein Certified product image


LESS NAKED WHEY GMO Free Recovery product image


Sports Whey Protein Isolate 5 Pound product image


Natural Factors Protein Chocolate Servings product image


TGS Natural 100 Protein Powder product image


True Athlete Natural Whey Protein product image

Top Natural Whey Protein 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