Dr. Mercola Pure Power, Endurance, Glycine + L-Arginine, Berry Blast, 9.1 oz (258 g) supplement bottle
Dr. Mercola

Pure Power, Endurance, Glycine + L-Arginine, Berry Blast, 9.1 oz (258 g)

What We Researched
8 active ingredients analyzed · 4 inactive ingredients decoded · 4 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
85
Product Score Good
81
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Glycine 4 g **
L-Arginine 2 g **
CitraPeak® Glucosyl-Hesperidin (from modified Citrus aurantium and Citrus sinensis Fruit Extracts) 200 mg **
Monoglucosyl Hesperidin 140 mg **
elevATP® (Ancient Peat Extract and Apple Fruit Extract) 150 mg **
Bioavailability Excellent

Absorption Rating

  • Glycine Good
  • L-Arginine Good
  • CitraPeak® Glucosyl-Hesperidin (from modified Citrus aurantium and Citrus sinensis Fruit Extracts) Good
  • Monoglucosyl Hesperidin Good
  • elevATP® (Ancient Peat Extract and Apple Fruit Extract) Good
Other Ingredients Excellent

Fillers & Additives

  • Malic Acid
  • Natural Flavor
  • Silicon Dioxide
  • Organic glucosyl steviosides (from organic stevia rebaudiana leaf)
Efficacy Fair

Dosage Analysis

  • Glycine 4 g Effective
  • L-Arginine 2 g Under-dosed
  • CitraPeak® Glucosyl-Hesperidin (from modified Citrus aurantium and Citrus sinensis Fruit Extracts) 200 mg Under-dosed
  • Monoglucosyl Hesperidin 140 mg Under-dosed
  • elevATP® (Ancient Peat Extract and Apple Fruit Extract) 150 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Calories 5
Total Carbohydrate <1 g <1%*
Total Sugars 0 g
Glycine 4 g **
L-Arginine 2 g **
CitraPeak® Glucosyl-Hesperidin (from modified Citrus aurantium and Citrus sinensis Fruit Extracts) 200 mg **
Monoglucosyl Hesperidin 140 mg **
elevATP® (Ancient Peat Extract and Apple Fruit Extract) 150 mg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Malic Acid Safe

Adds tartness and enhances fruit flavors in gummies and chewables.

Natural Flavor Safe

Improves taste of chewable, gummy, or liquid supplements.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Organic glucosyl steviosides (from organic stevia rebaudiana leaf) Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$60$59$58$57$56 Mar 12 $58.00
iHerb

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

Brand Trust Report
Dr. Mercola

Founded 1997 · Cape Coral, Florida, USA · 209 products · mercola.com/

Certifications

4 certifications
Consumerlab Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Verified Source

Violation History

7 incidents
Prop 65 Lead2025-04-18Source
Lawsuit Wrongful termination and breach of a severance contract by the former CEO.2024Source
Fda Warning Unapproved and misbranded products related to Coronavirus Disease 2019 (COVID-19).2021-02-18Source
Lawsuit False and unsupported claims that its indoor tanning systems are safe and do not increase the risk of skin cancer.2016Source
Fda Warning Illegal marketing of a medical device.2011-01-01Source
Fda Warning Illegal drug claims for various supplements.2006-01-01Source
Fda Warning Illegal drug claims for various supplements.2005-01-01Source
Related Supplements
Frequently Asked Questions
Is Dr. Mercola Pure Power, Endurance a good supplement?

Dr. Mercola Pure Power, Endurance, Glycine + L-Arginine, Berry Blast, 9.1 oz (258 g) received a product quality score of 85/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 8 active ingredients with 30 servings per container. Of the 4 inactive ingredients, 3 are rated safe and 0 are flagged for review. The manufacturer, Dr. Mercola, holds a brand trust score of 81/100 with 4 verified certifications including Consumerlab, Nsf Gmp, Usda Organic, Fda Gmp Inspections.

What are the ingredients in Dr. Mercola Pure Power, Endurance?

Dr. Mercola Pure Power, Endurance contains 8 active ingredients: Calories (5), Total Carbohydrate (<1 g), Total Sugars (0 g), Glycine (4 g), L-Arginine (2 g), CitraPeak® Glucosyl-Hesperidin (from modified Citrus aurantium and Citrus sinensis Fruit Extracts) (200 mg), and 2 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Dr. Mercola Pure Power, Endurance safe to take?

Dr. Mercola Pure Power, Endurance, Glycine + L-Arginine, Berry Blast, 9.1 oz (258 g) 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 Dr. Mercola a trustworthy supplement brand?

Dr. Mercola receives a brand trust score of 81/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1997 and headquartered in Cape Coral, Florida, USA, the company offers 209 products in their lineup. They hold 4 verified certifications including Consumerlab, Nsf Gmp, Usda Organic, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Dr. Mercola has 7 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. 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.