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Klean Endurance



What is Klean Endurance?

Klean Endurance by Klean Athlete™ is a NSF Certified for Sport® all natural D-Ribose chewable supplement clinically proven to help restore and replenish cellular energy. D-Ribose is a natural pentose sugar that creates ATP for the support of fatigue, energy production, and mitochondrial function. Klean Endurance chewable tablets are sweetened naturally and contain natural orange/vanilla flavoring.

Benefits of Klean Endurance:

  • Provides energy support for maximum performance
  • Tested and certified by the NSF Certified for Sport® program
  • NO yeast, wheat, gluten, milk/dairy, soy, artificial flavoring, artificial preservatives or genetically modied organisms (GMOs)

Why Use Douglas Laboratories Klean Athlete Line?

The Klean Athlete product line provides a solid nutrient foundation, including the vitamins, minerals and nutrients the body needs to perform at its best. Klean Athlete products fuel and fortify any athlete’s ability to optimize performance despite life’s daily stresses and promote an athlete’s overall health and wellness at any age, intensity or experience level. Every bottle of Klean Athlete is tested and certified by the NSF Certified for Sport® program, designed to endure safer sports nutrition, free from banned substances and contaminants. Whether you work with recreational athletes, active baby boomers or professional athletes, Klean Athlete has a place in your practice.

Additional information


90 Capsules

Serving Size

3 Capsules