Harvest Naturals

100% Soy Protein Isolate Powder

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  • 100% Soy Protein Isolate Powder
  • 100% Soy Protein Isolate Powder
  • 100% Soy Protein Isolate Powder



What is Soy Protein Isolate Powder?
Soy Protein Isolate is a concentrated source of high-quality soy protein. Soy Protein Isolate supplies the necessary amino acids, including the essential amino acids, to help support muscle growth. Soy Protein Isolate provides Glutamine and Arginine, two amino acids associated with hormone release and immune function. Soy Protein Isolate also contains naturally-occurring antioxidants. A common misconception with Soy Protein, in general, is that it limits testosterone in men; however, contrary to belief, there is no viable research that supports this claim. An in-depth review study showed that neither soy foods nor soy isoflavone supplements alter testosterone measurements in men. [1]

Potential Benefits of 100% Soy Isolate Protein Include:

  • May Support Weight Loss †
  • Supports Healthy Cholesterol †
  • Supports Lean Muscle Mass†

How Does Soy Protein Isolate Powder Work?
Made from defatted soybean flakes that have undergone an alcohol wash, soy protein operates similarly to whey protein. Soy protein, however, boasts fewer calories. Due to this reduction in caloric intake, it becomes a viable solution for those seeking to lose weight while still getting their intake of protein. In some studies, soy protein has been shown to boost weight loss just as effectively as animal-based proteins.
Soy protein is known as a complete protein, meaning that it contains all of the essential amino acids that your body requires from food.


Consider This:
Combine our Soy Protein Isolate with our BCAA 2:1:1 powder for added energy and recovery support.


Directions & Allergens

Suggested Use: 
As a dietary supplement, take 1 leveled scoop (~18 grams) with 8 - 12 ounces of water or suitable beverage and consume within 15 minutes of mixing. Taken 1 - 3 times daily, once in the morning, as a pre-workout, and/or as a post-workout for best results.

This product contains Soy and/or Soy derivatives. Does not contain Dairy, Dairy byproducts, Eggs, Fish, Shellfish, Wheat, Gluten, Tree Nuts, or Sesame Seeds.

This is a NON-GMO ingredient manufactured using organic starting ingredients.

Store in a cool, dry place. Re-seal bag immediately after use to preserve freshness.

Instant COA 

Another HR Supplements exclusive is the “Instant COA” (Certificate of Analysis). We have built a customer facing interface that will allow you to view product COA's on any mobile device. Simply scan the Quick Response (QR) code on the HR Supplements product label and instantly view the lab reports. Please click here to request a copy of archived COA's.  


Statements & Warnings †

† These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure or prevent any diseases.

Keep out of the reach of children. Do not take this or any other supplement if under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical conditions and/or taking prescription drug(s) or OTC medication(s). Always consult with a qualified health physician before taking any new dietary supplement.

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8 Reviews

  • 4
    Quality Source, Okay Taste/Texture

    Posted by Jaime Antonio Morales on 14th Apr 2016

    My favorite thing about this is that it is non GMO. I like to support non GMO products for economic and environmental reasons. It is also cheaper than most whey and HardRhino's is probably one of the cheapest out there depending on the season or the sales going on on other websites. However, non GMO is not as easy to find in other places and given this price, the value is GREAT. Hard Rhino was also kind enough to throw in a free shaker bottle and BOTH of my last two orders. That's great service! The texture is a little chalky yet still watered down. Its a bit thinner than other protein powders I had. Even with less water, it TASTES and feels less thick than other soy powders I had. However, its unflavored anyway and no unflavored powder tastes particularly good by itself. This tastes just fine when mixed in smoothies or with sweeteners added. The macros are great as well, as they should be since this is an isolate. And finally, after taking this for a long time, I have not experienced gyno or man boobs of any kind.

  • 5
    This product is awesome and so is hard rhino.

    Posted by Sergio Escobar on 18th Feb 2016

    Bought it as a gift to my gf.. second time i purchase it and it's great tasting. as well as greatly priced. hard rhino added one of their awesome blender bottles as a gift. what an awesome company. thank a lot!

  • 5
    Great low cost non gmo Protein Supplement

    Posted by Neil L on 24th Jan 2016

    I had a gastric bypass and I use this on a daily basis It mixes well with both hot and cold ingredients, With me being disabled and on a limited budget this is the best supplement I have found that is very affordable.

  • 5
    Cheap High Quality Alternative To Pair With Whey Isolate

    Posted by John W. on 26th Sep 2014

    I've been routinely buying 90% Whey Isolate from HardRhino as part of Do It Yourself Soylent recipe. I have more then doubled the amount of protein in my recipe which has caused my cost to increase dramatically on a per day per meal basis. On top of that the cost of Whey Isolate has been slowly but steadily rising from where it was six months ago. This lead me to consider alternatives, not necessarily to replace, but to pair with Whey Isolate to create a blend. After digging through all the trash talk and pseudo science put out by the Whey industry I came to the conclusion that Soy Isolate is a complete, bio available, and in some ways improved protein source. Now I know *exactly* what I eat because I make my own liquid nutrition. So I'm not saying that for folks eating traditional food if they have concerns about the pervasive presence of Soy in our food supply that they shouldn't be concerned about over saturation. What I am saying is if you aren't drinking Soy milk and eating processed foods loaded with Soy filler, don't be afraid to try Soy Isolate, it's great for maintaining muscle when reducing calories and for several amino's is actually richer then Whey Isolate. Again, not advocating as a replacement, but as a blend or part of a rotation Soy Isolate can save you money and provide benefits! So now I will step off the Soy Isolate isn't the devil train and talk about THIS product specifically. Hard Rhino say's it's GMO free, so thats cool, I don't really care personally but for those that do. Product comes (in the 11 pound variety) in a giant double bagged heavy duty zip tied inside a box. Not ideal for usage/storage but I just break it down into food grade "tubs". This product IS a bit harder to work with then whey. Where whey tends to clump and stick/bind to itself, Soy Isolate is a much finer powder and tends to aerosol with far less agitation or effort. I find myself routinely coughing/sneezing while prepping large quantities and then wiping everything down within 5-10 foot due to the fine mist of powder that has settled. Again not the end of the world, it's just a result of the physical characteristics of the product. Taste is fine. Whey is certainly better taste/texture wise but this is still miles above Pea Protein for taste/texture. TLDR: Soy is Cheap, Soy Has certain advantages over whey (amino profile), Soy isn't dangerous if you know your food sources, Soy will not make you grow man boobs.

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