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ISONatural Unflavored

ALLMAX
4.8
★ ★ ★ ★ ★
(2707 ratings)
Potassium 170 mg
Protein (unspecified) 27 Gram(s)
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Score60
A lean, clearly identified whey isolate with good value, best chosen for protein rather than potassium or heart support.
How scoring works
Quantity:5 Pound(s) • (78 servings)
Goals:

Score 60

A lean, clearly identified whey isolate with good value, best chosen for protein rather than potassium or heart support.
How scoring works

Also available as

3 options
Chocolate Protein (unspecified) 27 Gram(s), Potassium 240 mg • 5 Pound(s) • 73 servings $133.04 ($1.82 per serving) 2 servings Potassium 170 mg, Protein 27 Gram(s) • 2 lb(s) • 31 servings $59.99 ($1.93 per serving) Vanilla Protein (unspecified) 27 Gram(s), Potassium 160 mg • 5 Pound(s) • 73 servings $162.84 ($2.23 per serving)
$119.99($1.53 per serving)
Vitacost
$ 119.99
Vitacost
$ 119.99
iHerb
$ 129.54
iHerb
$ 162.84
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Analysis

Whey isolate delivers a large complete-protein serving with no listed fat or carbohydrate. The unflavored format can be easier to use in shakes or recipes without adding sweetness.

Ingredient and nutrient disclosure is comparatively clear, and the lean profile supports efficient protein intake. Potassium is present but remains a small contribution relative to normal daily needs.

Good qualitative value and a large container strengthen its case for regular protein use. Cardiovascular relevance remains indirect because the formula does not include targeted heart-support ingredients.

Who is it for
  • Adults wanting an unflavored whey isolate
  • People who mix protein into varied foods and drinks
Best for
  • Regular complete-protein supplementation
  • Low-fat and low-carbohydrate recipes

Pros

  • Substantial whey isolate serving
  • No listed fat or carbohydrate
  • Strong qualitative value for regular use
  • Unflavored format is versatile

Cons

  • Potassium amount is modest
  • Does not address heart-specific pathways
  • Mineral source forms are not identified

Warnings

  • Whey isolate is unsuitable for people with a milk allergy
  • A large protein serving may not fit medically restricted protein diets

Nutrient quality

56 Moderate impact

The nutrition panel gives potassium without naming its source or chemical form. The 170 mg potassium amount is low for dedicated supplementation.

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Ingredient transparency

72 High impact

Listed nutrients have clear amounts. No proprietary blend hides a key dose, but other ingredients and full directions are missing.

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Customer satisfaction

66 High impact

The supplied average rating is generally strong and the rating volume provides an aggregate signal. No comment-level evidence is provided to assess recurring complaints or confirm how experience matches the intended purpose.

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Value for money

44 Lower impact

The small mineral contribution or weak form disclosure limits effective value. The main non-mineral ingredients are purposeful rather than obvious padding.

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Ingredients

IngredientAmount per serving
Calories
110 Calorie(s)
Total Fat
0 Gram(s)
Total Carbohydrates
0 Gram(s)
Protein
27 Gram(s)
Calcium
116 mg
Sodium
45 mg
Potassium
170 mg
Gluten Free Adults 18–50 Kosher
Report overview
Potassium · 170 mg OverallScore32
F Active Ingredient Quality & BioavailabilityC Dose, Safety & Label TransparencyF Value

The potassium amount provides a moderate but limited contribution. Its source is not named, leaving bioavailability and metabolic function uncertain. The serving cost is below the collection median, yet value remains weak for potassium-focused use.

View ingredientView products
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W 100% Whey Isolate Protein Natural Flavor

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<p>Whey isolate provides a complete, digestible protein source with little carbohydrate and no low-value blend, giving it a more focused protein profile than the original. Clear dosing and a lean composition also make routine use easier to assess.</p>
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Platinum Hydrowhey Turbo Chocolate

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<p>Hydrolyzed whey supplies a large protein serving with very little carbohydrate, which appears better aligned with recovery than the original's broader or heavier nutrition. Peptide details and non-active ingredients are not fully supplied, so some formulation uncertainty remains.</p>
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100% Whey Protein Isolate Unflavored

NutraBio
<p>A concentrated whey-isolate serving with very little carbohydrate offers a leaner, more focused protein option than the original. The supplied facts omit full use details and contain a likely cholesterol unit error, which reduces confidence in the label data.</p>
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Rice Protein Powder Plain

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<p>Plain rice protein provides a straightforward plant-based protein source with little nutritional excess at a lower recurring cost than the original. The moderate protein amount and missing amino-acid details are meaningful trade-offs.</p>
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Pea Protein Power

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<p>Pea-protein concentrate offers a simple plant-based serving with little carbohydrate or fat at a lower routine cost than the original. Its protein amount is moderate, so it may fit lighter supplementation better than a full meal or demanding training plan.</p>
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Egg White Protein

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<p>Egg-white protein supplies a lean protein source with very little carbohydrate and no fat at a lower serving cost than the original. Missing non-active ingredient details limit a complete comparison, but the disclosed nutrition is less cluttered.</p>
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Nitro Tech 100% Whey Gold Double Rich Chocolate

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<p>A full protein serving with little carbohydrate combines a leaner profile with stronger serving-level value than the original. The exact whey ingredients and amino-acid composition are not identified, so the protein disclosure remains incomplete.</p>
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Micellar Casein Unflavored

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<p>Micellar casein supplies useful slow-digesting protein with little carbohydrate or fat, offering a focused option for longer gaps between meals. Favorable serving economics support value, although amino-acid, sourcing, and use details are missing.</p>
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Gold Standard 100% Whey Coffee

ON Optimum Nutrition
<p>A substantial whey serving and lean macronutrient profile provide a practical balance of protein quality and value. Ingredient forms and non-active ingredients are less completely disclosed than the core protein amount.</p>
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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Oral potassium supplementation for management of essential hypertension: A meta-analysis of randomized controlled trials.
    Poorolajal J; Zeraati F; Soltanian AR; Sheikh V; Hooshmand E; Maleki A · PloS one · 2017
    Meta-analysis1,213 participants23 studies pooledHeart Health forPotassium
  2. Potassium intake, stroke, and cardiovascular disease a meta-analysis of prospective studies.
    D'Elia L; Barba G; Cappuccio FP; Strazzullo P · Journal of the American College of Cardiology · 2011
    Meta-analysis247,510 participants11 studies pooledHeart Health forPotassium
  3. Effect of Potassium Supplementation on Endothelial Function: A Systematic Review and Meta-Analysis of Intervention Studies.
    D'Elia L; Cappuccio FP; Masulli M; La Fata E; Rendina D; Galletti F · Nutrients · 2023
    Meta-analysis332 participants5 studies pooledHeart Health forPotassium
  4. Magnesium and Potassium Supplementation for Systolic Blood Pressure Reduction in the General Normotensive Population: A Systematic Review and Subgroup Meta-Analysis for Optimal Dosage and Treatment Length.
    Behers BJ; Behers BM; Stephenson-Moe CA; Vargas IA; Meng Z; Thompson AJ; Melchor J; Wojtas CN; Rosario MA; Baker JF; Deevers AC; Mouratidis RW; Sweeney MJ · Nutrients · 2024
    Meta-analysisHeart Health forPotassium
  5. Potassium intake and risk of stroke in women with hypertension and nonhypertension in the Women's Health Initiative.
    Seth A; Mossavar-Rahmani Y; Kamensky V; Silver B; Lakshminarayan K; Prentice R; Van Horn L; Wassertheil-Smoller S · Stroke · 2015
    Cohort study90,137 participantsHeart Health forPotassium
  6. Effect of high potassium diet on endothelial function.
    Blanch N; Clifton PM; Petersen KS; Willoughby SR; Keogh JB · Nutrition, metabolism, and cardiovascular diseases : NMCD · 2015
    Randomized trial35 participantsHeart Health forPotassium
  7. Associations between sodium, potassium, and blood pressure: results from the Hispanic Community Health Study/Study of Latinos, a prospective cohort study.
    Swift SL; Sotres-Alvarez D; Raij L; Wassertheil-Smoller S; Schneiderman N; Llabre M; Zeki Al Hazzouri A; Rundek T; Van Horn L; Daviglus M; Castaneda S; Youngblood M; Mossavar-Rahmani Y; Elfassy T · The American journal of clinical nutrition · 2024
    Cohort study11,429 participantsHeart Health forPotassium
  8. Long-Term Potassium Monitoring and Dynamics in Heart Failure and Risk of Mortality.
    Núñez J; Bayés-Genís A; Zannad F; Rossignol P; Núñez E; Bodí V; Miñana G; Santas E; Chorro FJ; Mollar A; Carratalá A; Navarro J; Górriz JL; Lupón J; Husser O; Metra M; Sanchis J · Circulation · 2019
    Cohort study2,164 participantsHeart Health forPotassium
  9. Serum potassium levels provide prognostic information in symptomatic heart failure beyond traditional clinical variables.
    Toledo CC; Vellosa Schwartzmann P; Miguel Silva L; da Silva Ferreira G; Bianchini Cardoso F; Citelli Ribeiro V; Paim LR; Antunes-Correa LM; Carvalho Sposito A; Matos Souza JR; Modolo R; Nadruz W; Fernandes de Carvalho LS; Coelho-Filho OR · ESC heart failure · 2021
    Cohort study178 participantsHeart Health forPotassium
  10. Finerenone, Serum Potassium, and Clinical Outcomes in Heart Failure With Mildly Reduced or Preserved Ejection Fraction.
    Vardeny O; Vaduganathan M; Claggett BL; Desai AS; Jhund PS; Lam CSP; Senni M; Shah SJ; Voors AA; Zannad F; Pitt B; Matsumoto S; Merkely B; Zieroth S; Yilmaz MB; Lay-Flurrie J; Viswanathan P; Horvat-Broecker A; Scalise A; McMurray JJV; Solomon SD · JAMA cardiology · 2025
    Randomized trial6,001 participantsHeart Health forPotassium