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Source Naturals Mega Strength Beta Sitosterol supplement bottle
Source Naturals

Mega Strength Beta Sitosterol Review

What We Researched
6 active ingredients analyzed · 7 inactive ingredients decoded · 2 brand certifications checked · Page generated: Sep 2026
67
Product Score Fair
75
Brand Score Fair

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Calcium (as dibasic calcium phosphate) 32 mg 2%
Phytosterol Complex 937 mg †
beta-Sitosterol 375 mg †
Campesterol 187 mg †
Stigmasterol 131 mg †
Bioavailability Good

Absorption Rating

  • Calcium (as dibasic calcium phosphate) Fair
  • Phytosterol Complex Good
  • beta-Sitosterol Good
  • Campesterol Fair
  • Stigmasterol Fair
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Dibasic Calcium Phosphate
  • Silica
  • Hydroxypropyl Cellulose
  • Stearic Acid
  • Modified Cellulose Gum
  • Magnesium Stearate
Efficacy Very Poor

Dosage Analysis

  • Calcium (as dibasic calcium phosphate) 32 mg Under-dosed
  • Phytosterol Complex 937 mg Under-dosed
  • beta-Sitosterol 375 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 5
Calcium (as dibasic calcium phosphate) 32 mg 2%
Phytosterol Complex 937 mg †
beta-Sitosterol 375 mg †
Campesterol 187 mg †
Stigmasterol 131 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Dibasic Calcium Phosphate Generally_safe

It is used as a filler and to improve tablet hardness.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Hydroxypropyl Cellulose Safe

Binds tablet ingredients and can form tablet coatings.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Modified Cellulose Gum Generally_safe

It is used to improve the texture and stability of products.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Brand Trust Report
Source Naturals

Founded 1982 · Scotts Valley, CA, USA · 1511 products · sourcenaturals.com/

Certifications

2 certifications
Fda Gmp Inspections Source available Primary evidence
Non-GMO Project Verified Supporting evidence unavailable

Transparency

3 claims
Third Party Testing Claim — Claimed Evidence available Evidence
In House Testing — Verified Evidence available Evidence
Contains Proprietary Blend — True Brand claim; evidence unavailable
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Frequently Asked Questions
Is Source Naturals Mega Strength Beta Sitosterol a good supplement?

Source Naturals Mega Strength Beta Sitosterol received a product quality score of 67/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 6 active ingredients All 7 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Source Naturals, holds a brand trust score of 75/100.

What are the ingredients in Source Naturals Mega Strength Beta Sitosterol?

Source Naturals Mega Strength Beta Sitosterol contains 6 active ingredients: Calories (5), Calcium (as dibasic calcium phosphate) (32 mg), Phytosterol Complex (937 mg), beta-Sitosterol (375 mg), Campesterol (187 mg), Stigmasterol (131 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Source Naturals Mega Strength Beta Sitosterol safe to take?

GoodSupp reviewed the inactive-ingredient data available for Source Naturals Mega Strength Beta Sitosterol. All 7 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Source Naturals a trustworthy supplement brand?

Source Naturals receives a brand trust score of 75/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1982 and headquartered in Scotts Valley, CA, USA, the company offers 1511 products in their lineup.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.