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ISOFLEX Vanilla

4.6
★ ★ ★ ★ ★
(947 ratings)
Potassium 160 mg
Protein 27 Gram(s)
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Score80
A concentrated whey serving supports daily protein intake with a generally lean nutrition profile. Only 160 mg of potassium is provided, with no source form or heart-focused active ingredients disclosed.
How scoring works
Quantity:5 Pound(s) • (75 servings)
Goals:

Score 80

A concentrated whey serving supports daily protein intake with a generally lean nutrition profile. Only 160 mg of potassium is provided, with no source form or heart-focused active ingredients disclosed.
How scoring works
$139.99($1.86 per serving)
Vitacost
$ 139.99
iHerb
$ 162.84
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Analysis

The large vanilla tub delivers 27 g of protein with no listed fat and just 1 g of carbohydrate per serving. Low sodium and a lean macro profile make it easy to fit into a protein-focused diet.

Protein can support general nutrition and lean-mass maintenance, but it is not a targeted cardiovascular active. Only 160 mg of potassium is provided, with no source form or heart-focused active ingredients disclosed.

Seventy-five servings reduce reorder frequency, though the serving cost remains above many basic whey powders. A dedicated potassium or heart-health product would be more suitable when cardiovascular support is the main reason for purchase.

Who is it for
  • Adults who need a convenient complete-protein supplement
  • People building meals or shakes around whey protein
  • Users treating potassium as a minor dietary contribution rather than the main benefit
Best for
  • Increasing daily protein intake
  • Supporting muscle maintenance alongside exercise
  • Convenient shakes and mixed meals

Pros

  • Provides 27 g of protein per serving
  • Includes 160 mg of naturally occurring potassium
  • 55 mg of sodium is clearly disclosed
  • Low sodium and a lean macro profile make it easy to fit into a protein-focused diet.

Cons

  • Not formulated around heart-specific active ingredients
  • Potassium source form is not identified
  • Only 160 mg of potassium is provided, with no source form or heart-focused active ingredients disclosed.

Warnings

  • Whey is milk-derived and is not suitable for people with a milk-protein allergy.
  • People with chronic kidney disease may need an individualized protein and potassium limit before using a concentrated whey powder.
  • The naturally occurring potassium should be included in daily totals when using potassium-retaining medicines or following a potassium-restricted diet.

Nutrient quality

90 Highest impact

Whey isolate provides a substantial lean protein serving, while potassium makes only a modest contribution. The main protein amount is meaningful, though potassium remains modest.

Ingredient transparency

79 High impact

Active nutrient amounts are clearly shown on the supplied nutrition panel. The potassium compound and complete non-active ingredient list are not identified.

Customer satisfaction

82 Highest impact

The aggregate rating is generally favorable and is supported by moderate review volume. No specific review comments are supplied, so repeated complaints and purpose alignment cannot be assessed directly.

Value for money

66 High impact

Value is fair for the formula quality and effective serving. The price largely pays for protein rather than meaningful potassium delivery.

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Ingredients

IngredientAmount per serving
Calories
110 Calorie(s)
Total Fat
0 Gram(s)
Cholesterol
0 mg
Total Carbohydrates
1 Gram(s)
Protein
27 Gram(s)
Calcium
110 mg
Iron
0.4 mg
Sodium
55 mg
Potassium
160 mg
Gluten Free Adults 18–50 Kosher
Report overview
Potassium · 160 mg OverallScore29
F Active Ingredient Quality & BioavailabilityC Dose, Safety & Label TransparencyF Value

The 160 mg potassium serving supplies a limited amount compared with the collection benchmark. No potassium compound is identified, so bioavailability cannot be evaluated. Its somewhat favorable serving cost helps slightly, but the low dose still limits potassium value.

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Sources

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

  1. 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
  2. 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
  3. 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