Use GET20 at checkout for 20% off!

Taste, quality, variety—KOS has it all

We go way beyond the usual chocolate and vanilla offerings, with flavor faves like blueberry muffin, salted caramel coffee, and chocolate chip mint. In fact, our Organic Plant Protein comes in 7 delicious flavors, one for every day of the week, that pack in 20 grams of plant protein and a complete multivitamin.

90-day money-back guarantee

Best Flavored Protein Powder, 2021

“Get all your gains without sacrificing flavor with this delicious pick that has a five plant-powered protein blend for complete nutrition.”

—Popular Science

Find your favorite flavors

3 ways to enjoy

Mix 2 scoops in 8–10 oz. of cold water or plant milk

Add 2 scoops to your smoothie or shake

Substitute for flour in your favorite baking recipes

Blend it, bake it, BOOM

Whether you’re a chocolate kinda gal or a blueberry-muffin guy, our award-winning flavors are super tasty and versatile. No animal products, no sketchy fillers or additives, and no gritty, chalky texture.
Try KOS now

90-day money-back guarantee

America’s best-tasting protein powder

No whey, dude

And no dairy, soy, or gluten, either. Just organic, high-quality ingredients from responsibly managed farms.

Winner, winner, plants for dinner

Or breakfast, or lunch. Plant proteins are a heart-healthy way to boost energy and help you feel full longer.

Flavor savior

Self, Popular Science, and Women’s Health all agree: KOS is the best-tasting protein powder out there.

200,000+ happy customers and counting

“I am obsessed with the great flavor of blueberry muffin! I can't go 1 day in my household without making a blueberry muffin smoothie! I have been drinking the vanilla one for the past 2 years, and I am STILL not tired of it! That flavor is hard to beat! Overall, KOS has amazing flavor.”

Abbey C.

Abbey C.

“This chocolate peanut butter is hands down the most delicious protein shake I’ve ever had. And I’ve had a lot of them! It tastes like a milkshake, not a protein shake! I’m so happy to have the flavor of peanut butter without the caloric density of the real thing, because peanut butter is what heaven is made of! I also got the mint and blueberry muffin. Both are great.”

Susanne T.

Susanne T.

“Gah. The mint chocolate is to die for! I have it every morning blended with my coffee. Try it!”

Erin G.

Erin G.

Created by potrace 1.16, written by Peter Selinger 2001-2019

Try 1—or all 7—of our fantastic flavors

Our protein is a quick, healthy, and tasty way to get more plants into your diet. Jump on the KOS train and have some good, clean fun with plant power.
Try KOS now

90-day money-back guarantee

Created by potrace 1.16, written by Peter Selinger 2001-2019

Got questions? We’ve got answers!

Are KOS products certified organic?
Nearly every ingredient is certified organic and therefore free of hormones, antibiotics, pesticides, artificial sweeteners, colors, and GMOs. When you check out the ingredient panel of our labels, you’ll see “organic” in front of the specific ingredients that are certified organic.
What if I purchase and don’t like it?
We stand behind the quality of our products and want to make sure our customers are completely satisfied. Your satisfaction is guaranteed for a full 90 days from the date of purchase.
Is KOS tested for heavy metals?
Yes, all KOS products are thoroughly screened for a full spectrum of contaminants, including heavy metals. KOS protein contains more than a dozen ingredients, each of which is subjected to an individual screening—as is the whole of the batch—in both pre- and post-production phases. This full-spectrum screening for contaminants and heavy metals is managed in strict accordance with USDA Organic and CCOF compliance standards.
Where is KOS made?
Our formulas are made in sunny Southern California, and the ingredients are certified by the United States Department of Agriculture (USDA) and California Certified Organic Farmers Association (CCOF).