Doctor's Best Acetyl-L-Carnitine, 120 Veggie Caps (500 mg per Cap) supplement bottle
Doctor's Best

Acetyl-L-Carnitine, 120 Veggie Caps (500 mg per Cap)

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 1 brand certification checked · 4 retailers compared · Last updated: Mar 2026
100
Product Score Excellent
61
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Acetyl-L-Carnitine (from acetyl-l-carnitine HCl) 1000 mg
Bioavailability Excellent

Absorption Rating

  • Acetyl-L-Carnitine (from acetyl-l-carnitine HCl) Good
Other Ingredients Excellent

Fillers & Additives

  • Hypromellose (Vegetarian Capsule)
  • Microcrystalline Cellulose
  • Magnesium Silicate
  • Silicon Dioxide
Efficacy Excellent

Dosage Analysis

  • Acetyl-L-Carnitine (from acetyl-l-carnitine HCl) 1000 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Acetyl-L-Carnitine (from acetyl-l-carnitine HCl) 1000 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hypromellose (Vegetarian Capsule) Safe

It is used as a material for making vegetarian capsules.

Microcrystalline Cellulose Safe

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

Magnesium Silicate Generally_safe

It is used to improve powder flow and prevent clumping.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$25$23$22$20$19 Mar 12 $22.99$21.00
iHerb
Vitacost

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

Brand Trust Report
Doctor's Best

Founded 1990 · Tustin, California, USA · 186 products · doctorsbest.com

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source

Violation History

1 incident
Recall Red Yeast Rice2014-06-26Source
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Frequently Asked Questions
Is Doctor's Best Acetyl-L-Carnitine, 120 Veggie Caps (500 mg per Cap) a good supplement?

Doctor's Best Acetyl-L-Carnitine, 120 Veggie Caps (500 mg per Cap) 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 60 servings per container. Of the 4 inactive ingredients, 3 are rated safe and 0 are flagged for review. 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 Acetyl-L-Carnitine, 120 Veggie Caps (500 mg per Cap)?

Doctor's Best Acetyl-L-Carnitine, 120 Veggie Caps (500 mg per Cap) contains 1 active ingredients: Acetyl-L-Carnitine (from acetyl-l-carnitine HCl) (1000 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Doctor's Best Acetyl-L-Carnitine, 120 Veggie Caps (500 mg per Cap) safe to take?

Doctor's Best Acetyl-L-Carnitine, 120 Veggie Caps (500 mg per Cap) 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 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 186 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 1 historical regulatory incident 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. 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.