10 Best Best Grass Fed Whey Isolate of 2025

Tested and Reviewed: Top 10 Best Grass Fed Whey Isolate deals with expert ratings from 8.1 to a perfect 10

May 2026 Edition

Editor's Choice

9.7

Garden of Life

Garden of Life Sport Grass Fed Whey Protein Powder – 24g Whey Protein Isolate for Women & Men with Probiotics & Glutamine, Non-GMO, Gluten-Free, Cold-Processed, Vanilla Flavor, 20 Servings

Editor's bottom line:

“This best grass fed whey isolate is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

GRASS FED WHEY PROTEIN FOR WOMEN & MEN: One serving delivers 24g of grass fed whey protein isolate and probiotics for post-workout recovery and immune system support
VANILLA WHEY PROTEIN ISOLATE INGREDIENTS: This vanilla protein powder features grass fed whey protein isolate, 4g glutamine, BCAA amino acids, and probiotics for immune support
POST WORKOUT RECOVERY & IMMUNE SUPPORT: 24g grass fed whey protein plus glutamine and BCAAs support muscle repair, recovery time, and immune system health during intense training regimens
CLEAN & CERTIFIED: Certified Grass Fed, Non-GMO Project Verified, NSF Certified for Sport, NSF Certified Gluten-Free, soy-free, cold-processed, rBST/rBGH/antibiotic-free, BSE-free
EASY DAILY SUPPORT: Adults mix 1 scoop with water or milk for a convenient protein shake within one hour after workout or throughout the day for post-workout recovery, immune support, and lean body composition

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Picked by 397 people today

9.5

Nutricost

Nutricost Grass-Fed Whey Protein Isolate (Unflavored) 5LBS - rBGH Free, Non-GMO & Gluten Free

Main Highlights

Grass-Fed Whey Protein Isolate
5LBS of Undenatured Grass-Fed Whey Protein Isolate Per Bottle
Unflavored (Natural flavor), Pure Whey Protein Isolate
rBGH Free, Non-GMO & Gluten Free
Made in a GMP Compliant, FDA Registered Facility

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9.5

Nutricost

Nutricost Grass-Fed Whey Protein Isolate (Unflavored) 2LBS - Non-GMO, Gluten Free, Pure Protein

Main Highlights

Grass-Fed Whey Protein Isolate
2LBS of Undenatured Grass-Fed Whey Protein Isolate Per Bottle
Unflavored, Pure Whey Protein Isolate
rBGH Free, Non-GMO & Gluten Free
Made in a GMP Compliant, FDA Registered Facility

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9.2

Opportuniteas

Opportuniteas Grass Fed Whey Isolate Protein Powder – Unflavored, Heavy-Metal Tested, 28g Protein, Sourced from Ireland, Hormone-Free, Non-GMO, Packaged in USA – 1lb

Main Highlights

The Isolate Advantage (28g Protein + BCAAs): Unlike standard whey concentrates, our Irish Whey Protein Isolate undergoes a cold-filtration process to deliver 28g of pure protein and 7.9g of naturally occurring BCAAs per scoop. Its a clean, undenatured choice for those seeking to maximize muscle recovery without unnecessary fillers or fats.
Truly Grass-Fed Certified Sourcing: We dont just claim it; we carry the Truly Grass Fed seal. Sourced from Ireland, our cows graze on open pastures for at least 250 days a year with no added hormones. This sustainable approach ensures a superior nutritional profile compared to grain-fed alternatives and supports our 1% for the Planet mission.
Zero Bloat, Easy Digestion: Our advanced isolation process removes the bulk of lactose found in traditional powders, making this a naturally low-lactose and easy-to-digest formula. Designed to be gentle on the stomach, its the perfect solution for those who experience digestive discomfort or bloating from standard whey.
Lab Tested for Heavy Metals & Purity: Your safety is our priority. Every batch is lab-tested for heavy metals (including lead, arsenic, and mercury) and quality assurance verified for potency. Packaged in the USA, we maintain total transparency so you can trust the purity and protein content in every bag.
Clean Label Promise (Non-GMO & No Stevia): Made with clean ingredients and no artificial sweeteners, flavors, gums, or soy. We use a tiny amount of non-GMO sunflower lecithin for smooth mixingnever amino spiking. It is a pure, undisguised formula that accurately reflects the high-quality nutrition your body requires.

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9.0

Transparent Labs

Transparent Labs Grass-Fed Whey Protein Isolate - Naturally Flavored, Gluten Free Whey Protein Powder with 28g of Protein per Serving & 9 Amino Acids - 30 Servings, Milk Chocolate

Main Highlights

Naturally Flavored Clean Protein Powder: Made from naturally-fed, hormone-free whey, free of artificial sweeteners, food dyes, gluten, and preservatives. Transparent Labs 100% Grass-Fed Whey Protein Isolate is one of the cleanest proteins on the market.
28g of Protein Per Serving: Transparent Labs Whey Protein Isolate is sourced from 100% grass-fed, grass finished American dairy cattle. It contains one of the industrys highest protein-by-weight ratios, and packs 28g of protein per serving with minimal sugar or fat.
Enhance Recovery, Increase Strength: Transparent Labs 100% Grass-Fed Whey Protein Isolate gives you a highly bioavailable protein that is light on the stomach and goes down easily. This is the perfect protein for those who want to support recovery and promote muscle growth, while promoting overall health and longevity.
Contains All Nine Essential Amino Acids: Protein is made up of amino acids, which are the building blocks of muscle proteins. Depending on where your protein comes from, it will contain different amounts of the various building blocks. All of our protein powders contain all nine essential amino acids in a balanced ratio to support muscle protein synthesis, so you can trust that our protein powders will help you reach your muscle building and fitness goals.
Easily Digestible & Rapidly Absorbed: Theres nothing worse than the digestive discomfort often associated with trying to increase your protein intake. Our protein powder is designed with your digestive health in mind. No more bloating, gas, or digestive woes - just pure protein goodness that your body can readily utilize.

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8.8

Transparent Labs

Transparent Labs Grass-Fed Whey Protein Isolate - Naturally Flavored, Gluten Free Whey Protein Powder with 28g of Protein per Serving & 9 Amino Acids - 30 Servings, French Vanilla

Main Highlights

Naturally Flavored Clean Protein Powder: Made from naturally-fed, hormone-free whey, free of artificial sweeteners, food dyes, gluten, and preservatives. Transparent Labs 100% Grass-Fed Whey Protein Isolate is one of the cleanest proteins on the market.
28g of Protein Per Serving: Transparent Labs Whey Protein Isolate is sourced from 100% grass-fed, grass finished American dairy cattle. It contains one of the industrys highest protein-by-weight ratios, and packs 28g of protein per serving with minimal sugar or fat.
Enhance Recovery, Increase Strength: Transparent Labs 100% Grass-Fed Whey Protein Isolate gives you a highly bioavailable protein that is light on the stomach and goes down easily. This is the perfect protein for those who want to support recovery and promote muscle growth, while promoting overall health and longevity.
Contains All Nine Essential Amino Acids: Protein is made up of amino acids, which are the building blocks of muscle proteins. Depending on where your protein comes from, it will contain different amounts of the various building blocks. All of our protein powders contain all nine essential amino acids in a balanced ratio to support muscle protein synthesis, so you can trust that our protein powders will help you reach your muscle building and fitness goals.
Easily Digestible & Rapidly Absorbed: Theres nothing worse than the digestive discomfort often associated with trying to increase your protein intake. Our protein powder is designed with your digestive health in mind. No more bloating, gas, or digestive woes - just pure protein goodness that your body can readily utilize.

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8.6

AGN Roots

AGN Roots Grass Fed Whey Protein Powder Isolate - Unflavored - Unsweetened - Certified Entire Life On Pasture - A Greener World - ASPCA Registered Brand List - Informed-Sport - 3lbs

Main Highlights

Certified Grass Fed Whey Protein We do one thing, and do it well, provide Grass·Fed Whey with the assurances to back it up! AGN Roots is the only Truly Grass·Fed Whey Certified with Informed-Sport & Informed-Choice. Our farms are Certified Animal Welfare Approved by A Greener World - Globally recognized as the only "Entire Life on Pasture-based" Animal Welfare Certification.
A Greener World Certified AGN Roots Grass·Fed Whey Protein Powder unflavoured is sourced exclusively from Animal Welfare Approved Farms Certified by A Greener World, the Gold Standard of regenerative farming & humane food labels. Rest assured, your purchase is NOT supporting abusive CAFOs falsely marketing Whey as "grass-fed"; in fact, AGN Roots is the only Whey Protein Isolate recognized by the ASPCA's Shop with Your Heart Certified brand list!
Cold Processed & Undenatured AGN Roots Protein Powder Whey is cold-processed to ensure the highest naturally occurring & undenatured macro-nutrients. The moisture content varies around 5.4% due to carefully drying the Whey to preserve all nutrients (Competition is < 2%). Our protein is pouched fresh; it's fluffy and smells of fresh dairy cream.
AGN Roots Difference AGN Roots Grassfed Whey Protein Powder Isolate contains the highest natural concentration of BCAAs (6.5 grams) per 25 grams of protein compared to other so called grassfed whey competitors. By Supporting passionate farmers who foster a stress-free natural environment for their herds through their entire lives, you can reap the benefits of whey that contains 10% more BCAAs than the competition.
Best of the Bulks Weighing in at 3 lbs. (47 Servings) AGN Roots Grass Fed Whey Isolate Protein Powder Unflavored is more cost effective per serving than the other premium competition offering 5lb tubs; It will arrive in an air tight thermally protected pouch preventing heat & UV damage ensuring all micro-nutrients intact and limiting the carbon footprint of a giant plastic tub.

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8.3

Levels Nutrition

Levels Grass Fed Whey Protein Powder, No Artificials, 24G of Protein, Vanilla Bean, 5LB

Main Highlights

LEVELS WHEY PROTEIN: Each scoop of Levels Vanilla Bean Whey contains 24g Protein, 5.4g BCAAs (branched-chain amino acids), and no added sugars. Trusted by athletes, fitness enthusiasts and daily grinders everywhere, our whey is crafted for everyones lifestyle.
NOTHING FAKE: Levels Whey is naturally delicious. That means no hormones, no GMOs, no added sugars, no soy, no gluten, no bleach, no fillers, and no artificial flavors or sweeteners.
SIMPLE & CLEAN: No fake vanilla flavor here. Levels Vanilla Bean Whey is made with delicious Madagascar Vanilla Extract and lightly sweetened with monk fruit extract.
QUALITY FIRST: Quality milk tastes better, way better. Thats why grass-fed hormone-free dairy is the only dairy we use to make our whey protein concentrate. Whey concentrate is the least processed form of whey, which means its loaded with high-quality complete protein and essential amino acids.
MADE IN THE USA: Levels Whey Protein is made in the U.S.A. and is undenatured to protect bioactivity and naturally occurring growth factors. Each batch is cold-process microfiltered and blended with non-gmo sunflower lecithin for that insanely easy mixing you expect.

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8.1

NAKED

NAKED Whey Isolate Protein - Only 2 Ingredients, 30g Grass-Fed Protein, Zero Carb, Unflavored, Undenatured, Non-GMO, No Soy, Gluten-Free, No Preservatives - 28 Servings

Main Highlights

ONLY TWO INGREDIENTS: Grass Fed Whey Protein Isolate and Sunflower Lecithin (to aid solubility). Naked Whey Isolate contains no artificial sweeteners, flavors, or colors and is GMO-Free, Soy Free and Gluten-Free.
NAKED MEANS NOTHING ARTIFICIAL: Our Unflavored Whey Protein Isolate Powder is sourced from happy, pasture-fed cows from select farms in the UK, Ireland and New Zealand. Growth hormone free - no rBGH or rBST, only 100% clean protein.
MAXIMUM NUTRITION, ZERO CARBS: A zero carb protein powder with 30g of Protein, 0g of Sugar, 120 Calories, and 8.4g of BCAAs (branched-chain amino acids) per serving. Less than 0.1g of lactose per serving for easy digestion.
CHEMICAL-FREE & ULTRA-FILTRATION: Manufactured by ion exchange and ultra-filtration techniques, generating an un-denatured, soluble whey protein. And, unlike most whey isolate protein powders, our iso protein powder has been made using careful manufacturing processes to retain essential amino acids. Zero contamination from chemical detergents - no acid or bleach.
THE PERFECT ISOLATE PROTEIN: Use our whey protein powder isolate to create the ultimate pre and post workout whey shakes, smoothies, and recipes. Use two scoops of our low carb protein powder to enjoy premium nutrition that take your workouts, gains, and recovery to new heights.

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8.1

New Origins

New Origins European Grass Fed Whey Protein Isolate (Unflavored, 14 Servings, Non-GMO, Gluten-Free, Sugar & Soy Free)

Main Highlights

PURE GRASS FED WHEY ISOLATE from pasture-raised, ethically treated cows
100% INGREDIENT TRANSPARENCY with >99% grass-fed whey protein isolate from Ireland and <1% sunflower lecithin from Netherlands
ENHANCE MUSCLE GROWTH with 28g of protein and 7g of BCAAs per serving
NON-GMO, GLUTEN FREE, and NEVER ARTIFICAL - clean formula with no artificial sweeteners or flavors
PACKAGED IN THE USA with ingredients from Europe including Ireland and Netherlands
MIXES EASILY - blends and mixes easily into your favorite drink, smoothie, or recipe

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Our Best Overall Choice

Best Choice

9.7

Garden of Life

Garden of Life Sport Grass Fed Whey Protein Powder – 24g Whey Protein Isolate for Women & Men with Probiotics & Glutamine, Non-GMO, Gluten-Free, Cold-Processed, Vanilla Flavor, 20 Servings

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

GRASS FED WHEY PROTEIN FOR WOMEN & MEN: One serving delivers 24g of grass fed whey protein isolate and probiotics for post-workout recovery and immune system support
VANILLA WHEY PROTEIN ISOLATE INGREDIENTS: This vanilla protein powder features grass fed whey protein isolate, 4g glutamine, BCAA amino acids, and probiotics for immune support
POST WORKOUT RECOVERY & IMMUNE SUPPORT: 24g grass fed whey protein plus glutamine and BCAAs support muscle repair, recovery time, and immune system health during intense training regimens
CLEAN & CERTIFIED: Certified Grass Fed, Non-GMO Project Verified, NSF Certified for Sport, NSF Certified Gluten-Free, soy-free, cold-processed, rBST/rBGH/antibiotic-free, BSE-free
EASY DAILY SUPPORT: Adults mix 1 scoop with water or milk for a convenient protein shake within one hour after workout or throughout the day for post-workout recovery, immune support, and lean body composition

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