10 Best Whey Isolate Protein Powder No Sugar of 2025

Tested and Reviewed: Top 10 Whey Isolate Protein Powder No Sugar deals with expert ratings from 8.1 to a perfect 10

June 2026 Edition

Editor's Choice

9.7

NAKED

NAKED Whey 2LB 100% Grass Fed Whey Protein Powder - Only 1 Ingredient, Unflavored Whey Protein, NSF Certified, Undenatured, Gluten Free, Soy Free, No GMOs, No Preservatives

Editor's bottom line:

“This whey isolate protein powder no sugar is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

ONLY ONE INGREDIENT: 100% Grass Fed Pure Whey Protein with zero additives. Naked Whey has no artificial sweeteners, flavors, or colors and is GMO-Free, No rBGH or rBST, Soy Free and Gluten-Free.
ALL NATURAL WHEY: Our Grass Fed Whey is sourced from small non-GMO dairy farms to bring you a non-denatured whey packed full of essential amino acids, clean protein and glutathione.
MAXIMUM NUTRITION: 25g of protein, 2g sugar, 3g carbs, 120 calories, and 5.9g BCAAs per serving. As an NSF Certified protein powder, Naked Whey is verified for purity and safety.
COLD PROCESSED: Unlike most whey protein powders, Naked Whey is cold processed to ensure zero contamination from chemical detergents (no acid or bleach) or, synthetic additives, and this maintains important naturally occurring growth factors.
THE PERFECT WORKOUT PARTNER: Create pre and post workout whey shakes, smoothies and recipes to take your muscle gains and recovery to new heights.

Show Price

Picked by 397 people today

9.5

NATURE TARGET

NATURE TARGET Unflavored Whey Protein Isolate - 26g Protein, 0g Sugar, Keto Friendly - No rBGH, Grass Fed - Perfect for Coffee, Baking & Smoothies - 1.10 LB (16 Servings)

Main Highlights

PREMIUM WHEY PROTEIN ISOLATE: Loaded with the premium protein sources. Each serving whey protein powder contains 26g Protein, 5.5g BCAAs (branched-chain amino acids) that help grow and repair muscle, no added sugars
NOURISH YOUR MUSCLES: Our protein powder helps you refuels & repair muscles post-workout, supporting muscle building, strength and recovery, providing additional support for your nutrition and fitness goals
CLEAN WHEY ISOLATE PROTEIN POWDER: Our grass fed whey protein powder comes from free-range cows on small dairy farms in California. It is free of GMOs and is a clear protein powder grown on natural pastures that is quickly digested and absorbed by the body
MILD NATURAL FLAVOR: Enjoy the natural flavor of this isolate protein powder with no added artificial sweeteners. You can easily mix protein powder for women into food without affecting the original taste of the food. No grainy texture and chalky aftertaste. Formulated with Gum Acacia to improve flavor, tasting better than pure whey protein
ANYTIME PROTEIN: Perfectly fit into your daily life, you can add our whey protein powder in breakfast, or after fitness training, between meals. Our protein powder can be used any time of the day
SUITABLE FOR DAILY LIFE: Our unflavored protein powder is a premium source of protein. Whether you're an athlete, fitness enthusiast, or someone who just wants to stay active, our protein powder for men is the perfect choice. It can support intense workouts and help reduce calorie intake
TRANSPARENT AND TRUSTWORTHY: Produced in a facility that meets strict cGMP standards, our products are gluten free, have no artificial flavors, sweeteners, or added sugars, and are third-party lab tested for quality, safety, and potency, so you can trust our clean protein powder
TIPS: The production date can be found on the bottom of the bottle. If you have any questions about our whey isolate protein powder, you can always ask us for help

Show Price

9.5

DRFOSTER

DRFOSTER Whey Protein Powder Isolate - Unflavored, Grass-Fed, 26g Protein & 6g BCAAs for Muscle Growth & Recovery, Sugar Free & Keto Friendly, 1.1LB, 16 Servings

Main Highlights

PURE WHEY ISOLATE: Fuel your muscle growth with 26g pure protein and 6g BCAAs. A clean, 0 sugar & low calorie formula expertly crafted to power your fitness goals.
ONLY 2 INGREDIENTS: Features 100% whey isolate sourced from grass-fed cows on natural pastures. This simple, pure protein powder is rBGH-free.
POWER YOUR GOALS: This protein powder isolate supports muscle maintenance and development. Make it a smart post-workout choice to prepare for your next challenge.
VERSATILE & EFFICIENT: Unflavored protein powder can dissolve instantly and smoothly into any drink. Add to water, milk, shakes, coffee, or oatmeal for a quick nutritional boost.
TRUSTED: Flavorless protein powder is GMP-compliant, 3 Party Tested, gluten-free, soy-free, and non-GMO, making it a great choice for a keto diet.

Show Price

9.2

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.

Show Price

9.0

Isopure

Isopure Zero Carb 100% Pure Whey Isolate Protein Powder, Gluten Free, with Vitamins, Unflavored, 25g Protein Per Serving, 1 Lb, 16 Servings (Packaging May Vary)

Main Highlights

One 1 lb bag (16 servings) of Isopure 100% pure whey isolate protein powder to help support daily health and overall wellness; no flavor added
25 grams of 100% pure whey protein isolate powder is the ideal choice for men and women looking to maintain a high-protein intake to meet their daily protein needs
Stick to your wellness goals with a zero carb protein powder designed to help you maximize your protein intake without adding unnecessary carbs to your daily meals
Mix this sugar free whey protein powder with 6-8 fl oz of your favorite flavored beverage in a shaker or blender for a daily protein boost
Supporting everyday nutrition is easy for any lifestyle thanks to the blend of 8 ingredients in Isopures keto friendly protein supplement powder

Show Price

8.8

Save 8%

Isopure

Isopure Zero Carb 100% Pure Whey Isolate Protein Powder, Lactose Free, Gluten Free, with Vitamins, Creamy Vanilla, 25g Protein Per Serving, 1 Lb, 15 Servings (Packaging May Vary)

8% Off

Main Highlights

One 1 lb bag (15 servings) of Isopure 100% pure whey isolate protein powder in delicious Creamy Vanilla flavor
25 grams of 100% pure whey protein isolate powder is the ideal choice for men and women looking to maintain a high-protein intake to meet their daily protein needs
Stick to your wellness goals with a zero carb protein powder designed to help you maximize your protein needs without adding unnecessary carbs to your daily meals
With 0 grams of sugar, this creamy vanilla flavored whey protein powder still tastes delicious when mixed with 6-8 fl oz of your favorite beverage
Supporting everyday nutrition is easy for any lifestyle thanks to the blend of 8 ingredients in Isopures keto friendly protein supplement powder

Show Price

Best Value

8.6

Save 24%

Dymatize

Dymatize ISO100 Whey Protein Powder Isolate, Gourmet Vanilla, 25g of Protein, 5.5g BCAAs, Less Than 120 Cal., Gluten Free, 1g Fat, 1g Sugar, 2g Carb (20 Servings)

24% Off

Main Highlights

OUR BEST-QUALITY PROTEIN: Dymatize ISO100 is our higest-quality protein, and it is designed to support muscle growth through rapid protein absorption. The protein is broken down into small peptides, facilitating faster digestion and absorption.
WITH YOU, WE PUSH WHAT IS POSSIBLE: Just like you push to improve, Dymatize pushes protein to the next level. One of the best protein powders in the game, its filtered to remove excess lactose, carbs, fat, and sugar for maximum gains.
FOR EVERYONE: This protein powder that is Made in the USA is ideal for everyone. Whether youre at the beginning of your exercise journey, maintaining a healthy lifestyle, gym veteran, or need a quick meal replacement on the go, Dymatize is here.
SIMPLE: 25g of protein, 5g of BCAA, 1g of fat, 1g of sugar, gluten free, and less than 120 calories, ISO100 whey protein provides a simple macro
YOU MIX YOUR WAY: Mix with water, almond milk, oat milk, or your favorite liquid for a delicious drink. Add it to overnight oats, pancakes, or waffles to give your protein-packed meal to kick start your day.

Show Price

8.3

Optimum Nutrition

Optimum Nutrition Gold Standard 100% Whey Protein Powder, Double Rich Chocolate 1.98 Pound (Packaging May Vary)

Main Highlights

24 g High-Quality Whey Protein per Scoop 100% of the protein from whey for a fast-absorbing, complete protein source that supports muscle maintenance and growth.
5.5 g Naturally-Occurring BCAAs + 11g of naturally occurring EAAs Delivers essential amino acids including leucine, isoleucine, and valine to support post-workout muscle recovery, muscle strength and muscle building when taken over time with regular resistance training.
Low Sugar, Low Carb, Low Fat Ideal for Lean Muscle or Cutting Phases With just ~1 g sugar, ~3 g carbs per serving, and whey protein isolate as the primary ingredient with further carbs and fat isolated out. Its a high quality choice for athletes focused on lean muscle, weight management, or body-composition goals.
Instantized & Easy-Mix Formula (Great Mixability) Designed to dissolve smoothly in water, milk, or smoothies with a spoon, shaker, or blender perfect for fast post-workout shakes or convenient protein boosts.
Trusted Brand, Tested Quality & Versatile Use For 35 years, athletes have trusted Optimum Nutrition to fuel their training. Gold Standard Whey is the trusted choice for gym-goers, athletes, and everyday fitness enthusiasts worldwide use post-workout or as a protein supplement anytime.

Show Price

8.1

NOW Foods

NOW Foods Sports Nutrition, Whey Protein Isolate, 25 g With BCAAs, Unflavored Powder, 5-Pound

Main Highlights

NOW Sports products are comprehensively tested so you can trust that our products are pure and effective for every level of athletics
PROTEIN POWDER WITH BCAAs: Whey Protein Isolate is a high-quality protein that is both bioavailable and easily digested
UNFLAVORED : Mix one level scoop into your daily smoothie for 25 g of protein per serving
GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation)
Packaged in the USA by a family owned and operated company since 1968

Show Price

8.1

Isopure

Isopure Zero Carb 100% Pure Whey Isolate Protein Powder, Gluten Free, with Vitamins, Creamy Vanilla, 25g Protein Per Serving, 3 Lbs, 44 Servings (Packaging May Vary)

Main Highlights

One 3 lb container (44 servings) of Isopure 100% pure whey isolate protein powder in delicious Creamy Vanilla flavor
25 grams of 100% pure whey protein isolate powder is the ideal choice for men and women looking to maintain a high-protein intake to meet their daily protein needs
Stick to your wellness goals with a zero carb protein powder designed to help you maximize your protein needs without adding unnecessary carbs to your daily meals
With 0 grams of sugar, this creamy vanilla flavored whey protein powder still tastes delicious when mixed with 6-8 fl oz of your favorite beverage
Supporting everyday nutrition is easy for any lifestyle thanks to the blend of 8 ingredients in Isopures keto friendly protein supplement powder

Show Price

Our Best Overall Choice

Best Choice

9.7

NAKED

NAKED Whey 2LB 100% Grass Fed Whey Protein Powder - Only 1 Ingredient, Unflavored Whey Protein, NSF Certified, Undenatured, Gluten Free, Soy Free, No GMOs, No Preservatives

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

ONLY ONE INGREDIENT: 100% Grass Fed Pure Whey Protein with zero additives. Naked Whey has no artificial sweeteners, flavors, or colors and is GMO-Free, No rBGH or rBST, Soy Free and Gluten-Free.
ALL NATURAL WHEY: Our Grass Fed Whey is sourced from small non-GMO dairy farms to bring you a non-denatured whey packed full of essential amino acids, clean protein and glutathione.
MAXIMUM NUTRITION: 25g of protein, 2g sugar, 3g carbs, 120 calories, and 5.9g BCAAs per serving. As an NSF Certified protein powder, Naked Whey is verified for purity and safety.
COLD PROCESSED: Unlike most whey protein powders, Naked Whey is cold processed to ensure zero contamination from chemical detergents (no acid or bleach) or, synthetic additives, and this maintains important naturally occurring growth factors.
THE PERFECT WORKOUT PARTNER: Create pre and post workout whey shakes, smoothies and recipes to take your muscle gains and recovery to new heights.

Show Price

Deals are Live

Special Amazon deal ends in: