Both S&J Nourish and KOS deliver 20g of plant-based protein per serving, but that is where the similarities end. S&J Nourish™ is NSF Certified with zero allergens and a 4.9-star average from 2,847+ reviews. KOS is organic but uncertified for purity, contains 2 major allergens, and uses a multi-source blend that many users find gritty. According to a 2019 study in the Journal of the International Society of Sports Nutrition, pea protein isolate produces comparable muscle gains to whey protein during resistance training — which means your plant protein choice comes down to quality, not just quantity.
S&J Nourish™ Plant Protein
20g protein · All 9 EAAs · Free from all 9 allergens · NSF Certified
Quick Comparison
| Feature | S&J Nourish | KOS Organic Plant Protein |
|---|---|---|
| Protein per serving | 20g | 20g |
| Protein source | Pea protein isolate | Organic pea, rice, and flax |
| Allergen-free | All 9 of 9 major allergens | 2 of 9 |
| NSF Certified | Yes — every batch | No |
| Taste rating | 94% rate 5/5 | — |
| Zero bloating | 97% of customers | — |
| Flavors | 2 (Vanilla, Salted Caramel) | 6 |
| Customer rating | 4.9 stars from 2,847+ reviews | — |
S&J Nourish™ Plant Protein
20g protein · All 9 EAAs · Free from all 9 allergens · NSF Certified
Why S&J Nourish Wins This Comparison
The first thing most people notice about Nourish™ is the taste. It does not taste like a plant protein. It tastes like a dessert you are allowed to have twice a day. 94% of customers rate it 5 out of 5 for taste, and it consistently wins blind taste tests — not just against other plant proteins, but against whey. KOS has more flavors on the shelf, but flavor count is not flavor quality. If the texture is gritty and the aftertaste lingers, six options does not help.
"I've stirred it with a spoon in a coffee mug and it was smooth. Try that with any other plant protein and you'll be chewing your shake." — Craig F.
Nourish™ mixes instantly with just water and a shaker bottle — no blender needed. That is because pea protein isolate, unlike a multi-source blend of pea, rice, and flax, has been refined to remove the fiber, starch, and compounds that create chalkiness. The result is a smooth, creamy shake every time. And 97% of customers report zero bloating. According to Food Allergy Research and Education (FARE), food allergies affect approximately 32 million Americans. Nourish™ is free from all 9 major allergens. KOS contains 2.
Then there is what you cannot see on the label. Nourish™ is NSF Certified — every single batch is independently tested for purity, label accuracy, and banned substances. KOS holds USDA organic certification, which governs how ingredients are grown. But organic does not mean tested for contaminants, heavy metals, or label accuracy. According to NSF International, their Certified for Sport program screens for more than 270 banned substances. That level of independent verification matters. Nourish™ is also built within a women's fitness ecosystem backed by Sharny and Julius and a community of over 3,000,000 real followers across Instagram, Facebook, and TikTok.
What About KOS?
KOS is a solid budget option with USDA organic certification and 6 flavors. If organic sourcing is your single highest priority and you are not sensitive to allergens, it delivers 20g of plant protein at a lower price point. But it lacks NSF purity testing, contains 2 major allergens, and does not publish independent taste or bloating data.
Ingredient & Quality Deep Dive
Nourish™ uses one protein source: pea protein isolate. It delivers all 9 essential amino acids with a strong BCAA ratio — leucine, isoleucine, and valine — that matches or exceeds whey. Zero sugar, zero artificial sweeteners (no sucralose, no aspartame, no stevia blends), zero fillers, zero gums, zero colours. The ingredient list is short because nothing unnecessary made the cut.
KOS blends organic pea, rice, and flax proteins to create a broader amino acid profile through complementary sources. That approach works on paper, but it introduces more ingredients, more potential digestive irritants, and 2 major allergens. According to the FDA, dietary supplements do not require premarket approval, so the only way to know what is truly in your protein is independent testing. Nourish™ has it. KOS does not.
"Most protein powders have 15-20 ingredients I can't pronounce. Nourish™ has a short, clean list with nothing I'd question." — Hannah M.
Who Nourish™ Is Perfect For
- Women who have tried gritty, chalky plant proteins and want something that actually tastes good — 94% agree it does
- Anyone with food allergies or sensitivities who needs a protein free from all 9 major allergens
- Women who want NSF Certified purity — not just organic sourcing, but independent batch-level testing
- Those who want a smooth, instant-mixing shake with zero bloating — 97% of customers confirm it
- GLP-1 users and women with sensitive stomachs who need gentle, clean protein
- Women looking for a protein backed by a real fitness community, not just a supplement company
The Bottom Line
Both are plant-based. Both are 20g. But Nourish™ is NSF Certified, allergen-free, rated 4.9 stars across 2,847+ reviews, and causes zero bloating in 97% of customers. KOS is organic but untested by any independent purity body. If you want a protein you can trust completely — what is in it, how it tastes, and how your body handles it — Nourish™ wins this comparison convincingly.