The Future of Protein
ProteinRx | Yeast Protein Isolate
ProteinRx | Yeast Protein Isolate
- The ideal protein for peak human performance, sustainably extracted from yeast cells.
- Eliminate digestive issues, avoid allergens, and improve strength & confidence without bloating
- 16 serving bag (30g protein per serving) - 1.65 lbs
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No Peas, soy, rice, or seeds. No Whey. No Sugar. No animal products. No Bloating. No BS.








Nutrition on the Go
How To Use
Mix a scoop of ProteinRx with your favorite beverage for a quick, nutritious boost. Perfect for post-workout recovery, meal replacement, or a healthy snack on the go.

Ground-breaking nutrition
Why ProteinRx?
Complete Nutrition
Packed with a balanced amino acid profile and essential vitamins, particularly B-group vitamins.
Superior Taste & Texture
Crafted to delight your taste buds and get rid of that chalky mouth-feel without compromising on nutrition.
Allergen-Free
Ideal for everyone, especially those on vegan and vegetarian diets.
Benefits
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For Your Body
Supports muscle growth, gut health, and overall wellness. Fiber and protein keep you satiated without slowing you down.
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For The Planet
No animals are involved in the production, no farm land is used, minimal water and reduced greenhouse gas emissions.
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For Your Lifestyle
Keeps you feeling strong and confident with a complete amino acid profile. Low calorie and high in protein & fiber.
Join the Revolution for Sustainable Nutrition - the Future of Protein
ProteinRx, is a game-changer in the world of protein supplements. Born from the union of a vegan gymnast's quest for ethical nutrition and a fitness enthusiast's pursuit of lean muscle, ProteinRx is more than just a protein powder. It's a testament to sustainable innovation, crafted for the sophisticated, health-conscious consumer.
Customer Reviews
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"ProteinRx has transformed my fitness routine! Not only do I feel stronger, but I also take pride in making an eco-friendly choice."
-Amanda F. -
"As a vegan, finding a protein powder that meets my standards was tough. ProteinRx checks all the boxes – ethical, delicious, and effective."
-Teagan T.
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"It's great to add in essentially every smoothie I make - the taste is neutral, kind of like a cashew milk"
-Jason M.
FREQUENTLY ASKED QUESTIONS
FAQ
What is ProteinRx?
ProteinRx is a protein powder blend designed to be used daily in smoothies, yogurt, oats/chia, and even baking.
It’s a simple and clean blend with 6 ingredients, mostly protein and easily digested fiber, designed to keep you feeling strong, confident, and satiated.
Who is it for?
Our founder created ProteinRx to improve grandmom's strength, give his vegetarian wife a better option, and strengthen his aging parents.
In general, it's a high quality protein source to add to a diet that keeps you full with a great protein & fiber combo and no sugar.
The bonus to yeast is that it works for sensitive stomach, food allergies, and vegan lifestyles.
How is it Different?
Our protein blend uses a unique main ingredient derived from extracting the protein out of baker’s yeast cells.
This single-cell protein isolate is unique in that it doesn’t involve plants OR animals -- in fact, it comes from the fungal kingdom.
You get a complete protein with an amino acid profile similar to whey, without the allergens, and without using as much water, land, or pesticides.
How does it taste?
Most people describe the flavor as something mild, like an oat or nut milk. Our current recipe is ‘Unflavored’ - we like to call it ‘naked’ - it’s simple, with a touch of monk fruit sweetener for flavor.
We like unflavored because it's versatile -- add fruit, maybe peanut butter, maybe cacao powder, or even bake with it -- It'll taste great any way you like it; even in water.
How is it made?
Without plants or animals! Our protein comes from fermented yeast, fermented in tanks similar to those used for beer brewing. The yeast cells are broken apart and the protein is mechanically separated.
Why so much protein? (30g)
Most people under-estimate the protein they should consume in a day in order to thrive. The DRV, or daily recommended value is generally low, hard to interpret, and based on ‘enough to survive’. Most professionals agree that active bodies need about 1g of protein per pound of body weight. We’re hoping to help you achieve this goal in a tasty way.
Why different sweetener blends?
You choose whether you want unsweetened, organic monk fruit, and/or stevia - All are great options to keep insulin and glucose levels healthy.
'Monk Fruit and Stevia' is the sweetest, and unsweetened is great for baking or savory applications
Why is it a ‘prescription for the planet?’
By 2050 food needs are expected to double. We have limited space for farm land and raising EVEN more animals as food is not sustainable. With our main ingredient derived from fermented yeast, we‘re able to use less water, less land, and virtually eliminate pesticides and heavy metals from our product,
Why is it a ’prescription for your body?’
We’ve all had stomach, digestion, skin, and other issues from food. ProteinRx is free from the top 8 allergens, including dairy, nuts, and many other inflammatory ingredients. With our clean and simple blend, you can feel confident and strong -- without the issues!
What is the Amino Acid breakdown of Yeast Protein?
Yeast Protein has an Amino Acid profile similar to Whey, and both have a PDCAAS score of 1.0 (Protein Digestibility Corrected Amino Acid Score, a measure of how good a protein is for you, and 1.0 is the highest possible score, meaning it's excellent). See the chart on here for a Per 100g Amino Acid breakdown of Yeast Protein compared to Whey Protein

About ProteinRx
Product Details
- Ingredients: Premium yeast-based protein and fiber, sweetened with a bit of monk fruit. Full list.
- Nutritional Info: Rich in essential amino acids, low in allergens, high in dietary fiber. Nutrition facts.
- Usage: Perfect for shakes, baking, or adding a nutritious boost to your meals.
Ingredients
Ingredients: YESTEIN™ (Yeast Protein Isolate), SunFiber®, Sunflower Lecithin*, Psyllium Husk*, Konjac gum, Monk Fruit Extract*, Stevia.
Allergens: None. *Organic Ingredient
Nutrition Facts
This powder has changed my life. I had so many GI issues that my labwork was all off and beginning to get concerning. Many colon issues , on and on. I started this when a friend gave me a bag to try and it literally changed things for me in the best way!
Kevin is fantastic and such a great person. He obviously knows what the hell he is doing! THank you, Kevin!!
This protein has elevated my gym game and my lean gains... Always been a guy who has struggled to bulk at all In the past, partly because I have a fast metabolism, but also because I have trouble digesting certain foods (like soy, pea, whey to a degree). I have hit my all time high weight of 180 at 5'10, without having to dirty bulk and my best strength gains in my 30s so far in part thanks to protein RX. This protein powder is awesome - because it's non-bloat, easy to digest, is net energizing and contains fiber. Fiber being probably the most lacking thing from the American diet on avg, very awesome to get extra in your protein powder. Nutritionally speaking, I will never go back to other proteins based on soy, pea, whey, etc as my daily driver, protein RX is the one. ⚡
I randomly ran across a friend's Facebook post commending this protein powder, at the same time my non-whey or pea protein was discontinued. I wasn't very thrilled with it, but it has been extremely hard to find a protein powder that meets my needs. So glad they discontinued the product because Protein Isolate has been everything it has claimed, tastes the best, doesn't have sugar, mixes fantastically, and makes my gut happy! I am so very grateful to Protein RX for this incredible product! I now know why my friend made such a glowing post (and he has no affiliation with the company or owners!) I'm sure you'll love it as much as we do, highly recommend.
Very quick shipping and order was accurate. It's tasted great in a variety of drinks. The flavor is neutral and doesn't overpower the drink.
I really like the simple, clean ingredients.

Just want to sample it?
If you're on the fence, we've got sample packs you can try! (1, 2, & 3-packs).
They're great to share with friends and family who've got sensitive stomachs, allergies, or need a great vegan option