🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 12% of ingredients have research evidence
B Label Compliance Grade

Product Label

📸

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Label Data

1 Tablet(s) Serving Size
Botanical with Nutrients Product Type
12% Evidence Coverage

Supplement Facts — Evidence Check

Calcium
80 mg (6% DV)
📊 Market median: 142.5mg (70 products)
Median 142.5mg This product: 60mg
Cascara Sagrada
130 mg
40 mg
📊 Market median: 420.0mg (127 products) 📚 1 studies (Tier A: 0, B: 1)
This product: 40mg
15 mg
📊 Market median: 60.0mg (107 products) 📚 1 studies — no high-quality reviews
This product: 15mg
Gentian
5 mg
Rhubarb
4 mg
📊 Market median: 60.0mg (107 products) 📚 1 studies — no high-quality reviews
This product: 1.2mg

Other Ingredients

Microcrystalline Cellulose Croscarmellose Sodium Magnesium Stearate

Label Claims — Verification

All Other
Structure/Function
All Other (99% of products) Structure/Function (85% of products) Nutrient (54% of products) Approved Health (3% of products)

Target Groups

Vegan Vegetarian Adult (18 - 50 Years) Gluten Free Dairy Free Sugar Free

Product Information

📋 Directions for Use

Suggested Usage: For the relief of occasional constipation take 1 tablet at bedtime. If bowel does not act by midmorning of the following day, take another tablet.

⚠️ Warnings & Precautions

Notice: This product contains senna and cascara. Read and follow directions carefully. Do not use if you have or develop diarrhea, loose stools, or abdominal pain because senna and cascara may worsen these conditions and be harmful to your health.

Consult your health professional if you have frequent diarrhea, are pregnant or breastfeeding, are taking medication, or have a medical condition.

Sealed for your protection. Do not use if seal is broken.

🧪 Formulation Notes

Notice: This product contains senna and cascara.

Contains no artificial colors, preservatives, or sweeteners; no dairy, starch, sugar, wheat, gluten, yeast, soy, egg, fish, shellfish, animal products, salt, tree nuts, or GMOs.

Suitable for vegetarians/vegans.

Additional Information

isura Non-GMO - Mass spec Documentation - Lab tested

Natural Factors Ultra-Lax contains natural active herbal ingredients that product a gentle laxative effect in 6-12 hours.

Manufactured by Natural Factors to ensure safety and potency in accordance with Good Manufacturing Practices (GMP) of the FDA and Health Canada.

For freshness, store in a cool, dry place.

Product of Canada

Purity & potency guaranteed

Recyclable container and label.

Herbal formula

Gentle laxative relief

R4

Product Details

UPC / SKU 0 68958 04110 0
DSLD Entry Date 2017-08-22
Product Type Botanical with Nutrients
Form Tablet or Pill
DSLD ID 76280
Data Updated 2026-04-11

Research Evidence

849 Research Sources
56 Avg Quality Score
450 Meta Analysis
152 Rct
137 Systematic Review
73 Clinical Trial
11 Regulatory Source
7 Other
7 Guideline
3 Openfda Safety
2 Cochrane Review
2 Observational
A Phosphate binders for preventing and treating chronic kidney disease-mineral and bone disorder (CKD-MBD)
Meta Analysis The Cochrane database of systematic reviews 2018
A Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
Meta Analysis The Cochrane database of systematic reviews 2024
A Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in mid and late life
Meta Analysis The Cochrane database of systematic reviews 2018
A Calcium supplementation during pregnancy for preventing hypertensive disorders and related problems
Meta Analysis The Cochrane database of systematic reviews 2025
A Dietary calcium supplementation for preventing colorectal cancer and adenomatous polyps
Systematic Review The Cochrane database of systematic reviews 2008
A Calcium and vitamin D for increasing bone mineral density in premenopausal women
Systematic Review The Cochrane database of systematic reviews 2023
A Dietary sodium, sodium-to-potassium ratio, and risk of stroke: A systematic review and nonlinear dose-response meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2019
A The association between circulating magnesium and clinically relevant outcomes in patients with chronic kidney disease: A systematic review and meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2021
A Calcium channel blockers versus other classes of drugs for hypertension
Systematic Review The Cochrane database of systematic reviews 2021
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