Soy Isoflavones Extract

product on market Capsule 21st Century 🟢 Safety: 100/100
Brand: 21st Century
🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 50% of ingredients have research evidence
A Label Compliance Grade

Product Label

Label for Soy Isoflavones Extract
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Label Data

2 Vegetarian Capsule(s) Serving Size
30 Servings
Botanical Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

Total Carbohydrate
1 Gram(s) (1% DV)
100 mg
📊 Market median: 60.0mg (94 products) 📚 13 studies (Tier A: 0, B: 7)
This product: 100mg

Other Ingredients

Oat Fiber Rice Bran Cellulose Silicon Dioxide Magnesium Silicate Magnesium Stearate

Label Claims — Verification

❓ All Other
❓ Structure/Function
All Other (100% of products) Structure/Function (79% of products) Nutrient (5% of products)

Target Groups

Vegetarian Adult Female (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Directions: As an herbal supplement, adults take two (2) capsules daily with any meal or as directed by a healthcare provider. Do not exceed recommended dosage.

⚠️ Warnings & Precautions

Do not exceed recommended dosage.

Warning: Consult a healthcare provider prior to use if pregnant, nursing, on medications, have a medical condition or are planning a medical procedure.

Stop use and contact a physician if adverse reactions occur.

Keep out of reach of children.

Do not use if product appears to be tampered with or seal is broken.

Contains soy.

🧪 Formulation Notes

No added sugar, salt, yeast, preservatives or artificial flavors.

100% Vegetarian.

Standardized Soy Isoflavones Extract

Women's Health Support

Gluten free

Soy Isoflavones support women’s health especially during midlife years.

Additional Information

Individual results may vary.

Store at room temperature.

Guaranteed quality Laboratory tested

Product Details

UPC / SKU 7 40985 22306 2
DSLD Entry Date 2022-01-22
Product Type Botanical
Form Capsule
Brand 21st Century
DSLD ID 258593
Data Updated 2026-04-11

Research Evidence

16 Research Sources
51 Avg Quality Score
7 Meta Analysis
6 Rct
2 Clinical Trial
1 Systematic Review
B Soy isoflavones prevent bone resorption and loss, a systematic review and meta-analysis of randomized controlled trials
Meta Analysis Critical reviews in food science and nutrition 2020
PubMed DOI
B Isoflavone intervention and its impact on bone mineral density in postmenopausal women: a systematic review and meta-analysis of randomized controlled trials
Meta Analysis Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA 2024
PubMed DOI
B Effects of Soy Isoflavones on Biochemical Markers of Bone Metabolism in Postmenopausal Women: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Meta Analysis International journal of environmental research and public health 2021
PubMed DOI
B Effects of isoflavone interventions on bone turnover markers and factors regulating bone metabolism in postmenopausal women: a systematic review and meta-analysis of randomized controlled trials
Meta Analysis Archives of osteoporosis 2024
PubMed DOI
B Effects of isoflavone interventions on bone mineral density in postmenopausal women: a systematic review and meta-analysis of randomized controlled trials
Meta Analysis Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA 2020
PubMed DOI
C Effects of soy isoflavone supplements on bone turnover markers in menopausal women: systematic review and meta-analysis of randomized controlled trials
Meta Analysis Bone 2010
PubMed DOI
C Cholesterol-lowering effect of soy protein in normocholesterolemic and hypercholesterolemic men
Rct The American journal of clinical nutrition 1998
PubMed DOI
C Impact of phytoestrogens on treatment of urogenital menopause symptoms: A systematic review of randomized clinical trials
Systematic Review European journal of obstetrics, gynecology, and reproductive biology 2021
PubMed DOI
C Identification of the Key Active Pharmaceutical Ingredients of Yishen Qutong Granule, A Chinese Medicine Formula, In The Treatment of Primary Lung Cancer
Meta Analysis Combinatorial chemistry & high throughput screening 2023
PubMed DOI
C Assessing the combined effects of Black Cohosh, Soy Isoflavones, and SDG Lignans on menopausal symptoms: a randomized, double-blind, placebo-controlled clinical trial.
Rct European journal of nutrition
PubMed DOI
View all evidence for Soy →

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