California Gold Nutrition Ergothioneine, 25 mg, 90 Veggie Capsules supplement bottle
California Gold Nutrition

Ergothioneine, 25 mg, 90 Veggie Capsules Review

What We Researched
1 active ingredient analyzed · 3 inactive ingredients decoded · 1 brand certification checked · Last updated: Aug 2026
100
Product Score Excellent
79
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
L-Ergothioneine 25 mg †
Bioavailability Excellent

Absorption Rating

  • L-Ergothioneine Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Hypromellose
  • Magnesium Stearate
Efficacy Excellent

Dosage Analysis

  • L-Ergothioneine 25 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Ergothioneine 25 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.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Brand Trust Report
California Gold Nutrition

Founded 2013 · Irvine, California, United States · 492 products · californiagoldnutrition.com/

Certifications

1 certification
USDA Organic Verified

Transparency

6 claims
Third Party Testing Claim — Verified Source
Coa Availability — Verified Source
Testing Lab Disclosure — Claimed
In House Testing — Verified Source
Contains Proprietary Blend — True

Violation History

6 incidents
Recall California Gold Nutrition Daily Prenatal Multi, Ultamins Women's Multivitamin, and Ultamins Women's 50+ Multivitamin2025-06-26Source
Fda Warning Public health warning against the purchase and consumption of unregistered food supplement: CALIFORNIA GOLD NUTRITION Baby Liquid Vitamin D3.2025-01-10Source
Fda Warning Public health warning against the purchase and consumption of unregistered food product: CALIFORNIA GOLD NUTRITION Stabilized R-Lipolic Acid.2024-04-12Source
Fda Warning Public health warning against the purchase and consumption of unregistered food product: CALIFORNIA GOLD NUTRITION Silymarin Complex.2024-04-12Source
Fda Warning Public health warning against the purchase and consumption of unregistered food supplement: CALIFORNIA GOLD NUTRITION PQQ 20mg.2024-02-01Source
Fda Warning Public health warning against the purchase and consumption of unregistered food supplement: CALIFORNIA GOLD NUTRITION DAIRY ENZYMES.2019-09-26Source
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Frequently Asked Questions
Is California Gold Nutrition Ergothioneine, 25 mg a good supplement?

California Gold Nutrition Ergothioneine, 25 mg, 90 Veggie Capsules received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 90 servings per container. All 3 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, California Gold Nutrition, holds a brand trust score of 79/100 with 1 verified certifications including USDA Organic.

What are the ingredients in California Gold Nutrition Ergothioneine, 25 mg?

California Gold Nutrition Ergothioneine, 25 mg contains 1 active ingredients: L-Ergothioneine (25 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is California Gold Nutrition Ergothioneine, 25 mg safe to take?

California Gold Nutrition Ergothioneine, 25 mg, 90 Veggie Capsules has been analyzed for ingredient safety across all its components. All 3 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is California Gold Nutrition a trustworthy supplement brand?

California Gold Nutrition receives a brand trust score of 79/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2013 and headquartered in Irvine, California, United States, the company offers 492 products in their lineup. They hold 1 verified certifications including USDA Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: California Gold Nutrition has 6 historical regulatory incidents on record, which are factored into the trust score.

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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.