Jarrow Formulas Selenium Synergy supplement bottle
Jarrow Formulas

Selenium Synergy

What We Researched
4 active ingredients analyzed · 6 inactive ingredients decoded · 5 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
90
Product Score Excellent
83
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin E (as D-Alpha-Tocopheryl Succinate) 20 mg 133%
Riboflavin 2 mg 154%
Selenium (as Methylselenocysteine) 200 mcg 364%
Glucoraphanin 10 mg
Bioavailability Very Good

Absorption Rating

  • Vitamin E (as D-Alpha-Tocopheryl Succinate) Good
  • Riboflavin Good
  • Selenium (as Methylselenocysteine) Good
  • Glucoraphanin Fair
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Bovine Gelatin
  • Calcium Phosphate
  • Maltodextrin
  • Magnesium Stearate
  • Silicon Dioxide
Efficacy Very Good

Dosage Analysis

  • Vitamin E (as D-Alpha-Tocopheryl Succinate) 20 mg Effective
  • Riboflavin 2 mg Effective
  • Selenium (as Methylselenocysteine) 200 mcg Effective
  • Glucoraphanin 10 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin E (as D-Alpha-Tocopheryl Succinate) 20 mg 133%
Riboflavin 2 mg 154%
Selenium (as Methylselenocysteine) 200 mcg 364%
Glucoraphanin 10 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.

Bovine Gelatin Safe

Forms capsule shells. Sourced from bovine (cow) collagen.

Calcium Phosphate Generally_safe

It is used as a filler and anticaking agent in supplements.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Price Comparison

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Jarrow Formulas

Founded 1977 · Los Angeles, California, USA · 138 products · jarrow.com/

Certifications

5 certifications
Consumerlab Verified Source
Fda Gmp Inspections Verified Source
Non Gmo Project Verified Source
Usda Organic Verified Source
Vegan Certified Verified Source

Transparency

3 claims
Third Party Testing Claim — Verified Source
In House Testing — Verified Source

Violation History

2 incidents
Recall Liquid L-Carnitine2018-01-15Source
Prop 65 Lead2017-09-07Source
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Frequently Asked Questions
Is Jarrow Formulas Selenium Synergy a good supplement?

Jarrow Formulas Selenium Synergy received a product quality score of 90/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 4 active ingredients with 60 servings per container. Of the 6 inactive ingredients, 4 are rated safe and 0 are flagged for review. The manufacturer, Jarrow Formulas, holds a brand trust score of 83/100 with 5 verified certifications including Consumerlab, Fda Gmp Inspections, Non Gmo Project, Usda Organic.

What are the ingredients in Jarrow Formulas Selenium Synergy?

Jarrow Formulas Selenium Synergy contains 4 active ingredients: Vitamin E (as D-Alpha-Tocopheryl Succinate) (20 mg), Riboflavin (2 mg), Selenium (as Methylselenocysteine) (200 mcg), Glucoraphanin (10 mg). Notable high-dose ingredients include Selenium at 364% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Jarrow Formulas Selenium Synergy safe to take?

Jarrow Formulas Selenium Synergy has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Jarrow Formulas a trustworthy supplement brand?

Jarrow Formulas receives a brand trust score of 83/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1977 and headquartered in Los Angeles, California, USA, the company offers 138 products in their lineup. They hold 5 verified certifications including Consumerlab, Fda Gmp Inspections, Non Gmo Project, Usda Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Jarrow Formulas has 2 historical regulatory incidents on record, which are factored into the trust score.

What is magnesium good for?

Magnesium Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding magnesium good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

How much magnesium per day?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What is zinc good for?

Zinc Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding zinc good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

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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. 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.