Doctor's Best CoQ10 L-Carnitine Magnesium supplement bottle
Doctor's Best

CoQ10 L-Carnitine Magnesium Review

What We Researched
3 active ingredients analyzed · 7 inactive ingredients decoded · 1 brand certification checked · Last updated: Aug 2026
91
Product Score Excellent
61
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
Magnesium(from 1,112 mg magnesium bisglycinate chelate buffered - magnesium bisglycinate chelate, magnesium oxide) (Albion®) 200 mg 48%
L-Carnitine Fumarate(yielding 500 mg L-Carnitine) 855 mg
Coenzyme Q10 (Ubiquinone) 200 mg
Bioavailability Good

Absorption Rating

  • Magnesium(from 1,112 mg magnesium bisglycinate chelate buffered - magnesium bisglycinate chelate, magnesium oxide) (Albion®) Good
  • L-Carnitine Fumarate(yielding 500 mg L-Carnitine) Fair
  • Coenzyme Q10 (Ubiquinone) Fair
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Vegetable Magnesium Stearate
  • Hypromellose
  • Magnesium Stearate
  • Silica
  • Modified Cellulose
  • Silicon Dioxide
Efficacy Excellent

Dosage Analysis

  • Magnesium(from 1,112 mg magnesium bisglycinate chelate buffered - magnesium bisglycinate chelate, magnesium oxide) (Albion®) 200 mg Effective
  • L-Carnitine Fumarate(yielding 500 mg L-Carnitine) 855 mg Effective
  • Coenzyme Q10 (Ubiquinone) 200 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Magnesium(from 1,112 mg magnesium bisglycinate chelate buffered - magnesium bisglycinate chelate, magnesium oxide) (Albion®) 200 mg 48%
L-Carnitine Fumarate(yielding 500 mg L-Carnitine) 855 mg
Coenzyme Q10 (Ubiquinone) 200 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.

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Modified Cellulose Safe

Creates vegetarian capsule shells with controlled dissolution.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Brand Trust Report
Doctor's Best

Founded 1990 · Tustin, California, USA · 351 products · doctorsbest.com

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source

Violation History

3 incidents
Lawsuit False advertising and mislabeling of glucosamine supplements.2022Source
Recall Red Yeast Rice2014-06-26Source
Recall Red Yeast Rice 600 mg Capsules, 120-count bottles2014-06-24Source
Related Supplements
Frequently Asked Questions
Is Doctor's Best CoQ10 L-Carnitine Magnesium a good supplement?

Doctor's Best CoQ10 L-Carnitine Magnesium received a product quality score of 91/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 3 active ingredients All 7 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Doctor's Best, holds a brand trust score of 61/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Doctor's Best CoQ10 L-Carnitine Magnesium?

Doctor's Best CoQ10 L-Carnitine Magnesium contains 3 active ingredients: Magnesium(from 1,112 mg magnesium bisglycinate chelate buffered - magnesium bisglycinate chelate, magnesium oxide) (Albion®) (200 mg), L-Carnitine Fumarate(yielding 500 mg L-Carnitine) (855 mg), Coenzyme Q10 (Ubiquinone) (200 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Doctor's Best CoQ10 L-Carnitine Magnesium safe to take?

Doctor's Best CoQ10 L-Carnitine Magnesium has been analyzed for ingredient safety across all its components. All 7 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 Doctor's Best a trustworthy supplement brand?

Doctor's Best receives a brand trust score of 61/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1990 and headquartered in Tustin, California, USA, the company offers 351 products in their lineup. They hold 1 verified certifications including Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Doctor's Best has 3 historical regulatory incidents on record, which are factored into the trust score.

Scan Any Supplement Instantly

Download GoodSupp to scan barcodes, check ingredient safety, and find the best supplements for your needs.

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.