Isopure Zero Carb Whey Isolate Protein Powder, Unflavored 1 LB Review

ISOPURE® Unflavored Whey Protein Isolate is presented on this page as premium protein that is true to its name. Each scoop contains 25 grams of 100% pure whey protein isolate, and the product is described as stripped of fat, carbs, fillers, and sugars. The formula has no added colors, flavors or sweeteners. The page says it is perfect for mixing into favorite cold beverages, smoothies, sauces and baked goods recipes. The Nutritional Information panel highlights 25g of protein, 100% whey protein isolate, zero carbs and sugar free. The Made with Trusted Ingredients section repeats 25g protein, 0g carbs, 0g sugar, 100% whey isolate, and states the product is gluten free with no artificial flavors. The Benefits list says the powder supports muscle building and recovery, helps meet daily protein needs, offers weight management support, and supports muscle health as we age. The Suggested Use section lists three timings: post workout or other strenuous activity, first thing in the morning, and between meals. The directions say to mix 1 scoop with 6 fluid ounces of water, milk or your favorite beverage in a shaker or blender. The How to Use area describes a daily protein boost by adding one scoop to water, coffee or smoothies, a way to mix it into anything such as shakes, baked goods, oats or yogurt, and support for fitness goals through muscle recovery and daily protein intake. A comparison table on the page positions this unflavored product as offering full control and maximum versatility with 0g carbs and 100% whey isolate, while the flavored, clear and Essentials lines are described as more convenient, ready to drink or flavor forward options. The FAQ section explains that unflavored protein has a neutral taste designed to blend into foods without altering flavor. It answers that the product can be mixed into coffee, smoothies, oatmeal, yogurt or baked goods. It states that with 0g carbs and 0g sugar per serving the product is an option for low-carb and keto lifestyles. It also defines whey protein isolate as a highly filtered form of whey that removes most fats and carbohydrates, which results in a higher protein concentration per serving. The page offers a size selector with 14 servings (0.90 lb), 40 servings (2.55 lb) and 62 servings (3.96 lb). The default selection is 14 servings at a sale price of $39.99, with a listed price per serving of $2.85. Subscription options are shown with a save 20 percent on subscription orders message, plus free shipping on subscription orders and the ability to skip, pause or cancel anytime. A one-time purchase option is also listed. Footnotes state that the statements have not been evaluated by the Food and Drug Administration and that the product is not intended to diagnose, treat, cure or prevent any disease. Other footnotes note that no significant difference has been shown between RBST treated and non-RBST treated cows, that the muscle claims apply when used over time with regular resistance exercise, and that the product is not a low calorie food.

Product Focus: Muscle and StrengthAlso covers:Digestion
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions

Study, Trial or Testing Result Summary

MembersHuman studies

1 of these 81 human studies gave whey protein by drip, not by mouth.

This product gives 25 grams of whey protein isolate per serving, close to the 30 grams used in studies. The evidence shows whey build muscle when combined with strength training. …

Members see the full analysis, checked against their own meds and goals. Start My 7-Day Free Trial →

Review Totals and Summary

Members4,975 reviews
4,975 reviews · Walmart 4,697 · EBay 122 · Theisopurecompany 108 · Kroger 48

Isopure Zero Carb Whey Isolate Protein Powder, Unflavored 1 LB, has garnered approximately 4867 ratings across various stores, with a () giving it 4 or 5 stars. Overall, customers its mixability, clean composition, and taste, making it a versatile option for . **What buyers say it did for them:** users appreciate this protein powder for its effectiveness and on the digestive system. …

Members see the full analysis, checked against their own meds and goals. Start My 7-Day Free Trial →

Biohacker Summary

MembersWhat our biohacker panel says

People take it mainly to keep and build muscle, recovery, feel , and steady blood sugar, with daily targets running from about 1.2 to 2.4 grams per kilogram of body weight and some spreading it over three or four meals. Forms and pairings mentioned include unflavored isolate, goat whey, smoothies with collagen and fruit, a pre-workout muscle made with berries and psyllium husk, and protein blended with olive oil at breakfast. …

Members see the full analysis, checked against their own meds and goals. Start My 7-Day Free Trial →

RAL Summary

MembersThe tier and why

reviews show whey protein at about this dose muscle mass and strength alongside strength training, and of nearly 5,000 reviews are .

Members see the full analysis, checked against their own meds and goals. Start My 7-Day Free Trial →

More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Musculoskeletal system, Digestive system. Combine with and possible side are for members.

Members see the full analysis, checked against their own meds and goals. Start My 7-Day Free Trial →

Supplement Facts

Includes 0g Added Sugars 0 g · Calcium 80 mg · Potassium 80 mg
Supplement Facts
Serving Size 29g (About 1 Scoop)
Servings Per Container About 14
Amount Per Serving% Daily Value
Calories100
Total Fat0 g0%
Cholesterol5 mg2%
Sodium160 mg7%
Total Carbohydrate0 g0%
Total Sugars0 g
Includes 0g Added Sugars0 g0%
Protein25 g50%
Calcium80 mg6%
Potassium80 mg2%
* Percent Daily Values are based on a 2,000 calorie diet.

Other ingredients: Whey Protein Isolate, Sunflower or Soy Lecithin.

Directions: Mix 29g (About 1 Scoop) with 6-8 fl oz of your favorite flavored beverage in a shaker or blender. If a shaker or blender is not convenient, ISOPURE® Zero Carb protein can be stirred into solution with a spoon. ISOPURE® Zero Carb protein powder can also easily be mixed in with your favorite foods to help meet your daily protein needs.

Label source: Theisopurecompany · Report a label change

Where to Buy

Isopure · Walmart · Kroger
IsopureBuy ↗
WalmartBuy ↗
KrogerBuy ↗

We sell no supplements. Prices change; check the store.

More muscle and strength products

MembersThe highest ranked for the same goal

Read more

Our articles on this subject

Graded October 28, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.