ProveIt Supplements

Independent, evidence-based supplement analysis.

✓ Not Sponsored

✓ No Paid Reviews

✓ Science-Based

Company

  • About Us
  • Our Methodology
  • Contact
  • Blog
  • Authors

Legal

  • Privacy Policy
  • Terms of Service
  • Medical Disclaimer
  • Affiliate Disclosure

Resources

  • All Categories
  • Ingredient Database
  • Browse Supplements
  • FAQ

© 2026 ProveIt Supplements. All rights reserved.

Medical Disclaimer: The information provided is for educational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen.

Prove It
Browse SupplementsBlogAuthorsAboutMethodologyFAQ
Get Your Personalized Supplement StackSupplement Stack Quiz
Menu
HomeBrowse SupplementsBlogAuthorsAboutMethodologyFAQ
Soy Protein Isolate (90% Protein)

Soy Protein Isolate (90% Protein)

BulkSupplements.com

#Protein Powder
78
Safety85
Efficacy70
Transparency80
Based on Examine, Wikipedia, and 23 other sources

Overview

Soy protein isolate is a plant-based protein source offering a complete amino acid profile, making it suitable for individuals with dietary restrictions. While effective for general protein intake, it may not be as potent as whey protein for maximizing muscle protein synthesis due to its lower leucine content, but it has other benefits and can assist in muscle protein synthesis.

The Good

High protein content per serving

Complete amino acid profile

Lactose-free

The Bad

Lower in leucine compared to whey protein, potentially limiting muscle protein synthesis

May cause bloating or gas in some individuals

Soy is a common allergen

Is it for you?

Best For: Vegans, vegetarians, individuals seeking a dairy-free protein, muscle recovery, general protein supplementation

Skip If: You have a soy allergy or sensitivity, or specific hormonal concerns related to phytoestrogens.

Ingredients Analysis

Saturated Fat

Trans Fat

Cholesterol

Sodium

405 mg

Total Carbohydrates

1 g

Dietary Fiber

Added Sugars

Vitamin D

Iron

3.24 mg

Calcium

23.6 mg

Potassium

10 mg

How to Use

Mix 1 serving with water, milk, or your favorite beverage. Can also be added to smoothies or recipes.

Frequency:

Daily

Best Time:

Anytime

When:

Post-workout or between meals

Who Should Use This

Best For:

Vegans, vegetarians, individuals seeking a dairy-free protein, muscle recovery, general protein supplementation

Recommended Articles

2025's Top Vegan Protein Powders: A Buyer's Guide

2025's Top Vegan Protein Powders: A Buyer's Guide

In 2025, the best vegan protein powders are third-party tested, ensuring purity, safety, and high nutritional content.

Top Ingredients for Healthy Weight Management

Top Ingredients for Healthy Weight Management

Dietary fiber, protein, omega-3 fatty acids, and water are crucial for managing a healthy weight.

Top Immune Support Ingredients: What Works?

Top Immune Support Ingredients: What Works?

Vitamin D, zinc, and echinacea are key ingredients in immune support supplements, backed by scientific evidence.

Top Anti-Inflammatory Supplement Ingredients

Top Anti-Inflammatory Supplement Ingredients

Curcumin, omega-3 fatty acids, CBD, and Vitamin D are proven to effectively reduce chronic inflammation.