SUPERBOWL SALE - 25% OFF + FREE SHIPPING
DISCOUNT APPLIED AT CHECKOUT
JOIN BRL SPORTS IN CELEBRATING OUR OLYMPIAN - HAMA TAIEB!
90-DAY MONEY-BACK GUARANTEE

Does Quercetin Enhance Endurance?

by Sally Ladd June 25, 2018 1 min read

vegetables containing quercetin

There was great excitement about initial studies done on quercetin in mice demonstrating improved athletic endurance. However, studies in humans have been disappointing.

Quercetin is a phytochemical found in red, green and purple pigmented plants, including apples, red onions, tomatoes and berries. The substance is sold as a dietary supplement in isolated form. 

Quercetin Studies

Early studies in mice demonstrated evidence that quercetin enhanced performance in mice. In one study, two groups of mice were given either quercetin or placebo and were tested before and after administration on a wheel treadmill. The mice that received quercetin ran  37% longer that their counterparts receiving the placebo.

Several quercetin studies in human athletes and non-athletes did not produce the same results. F.R.S. financed a small study which demonstrated that highly trained human athletes improved their performance on quercetin. The subjects were then given a placebo and they also had significant improvement in performance. A second study was done using 12 untrained men who demonstrated improvement after 1 week on quercetin.

However three additional studies had disappointing results. Runners in the 100-mile Western States Endurance Run were given quercetin and saw no difference. A similar study done with cyclists by the same researchers, who found no difference in endurance levels.

The most recent study was done in 2009 by Coca-Cola, which was testing a new drink containing quercetin. In a New York Times article, lead author Kirk J. Cureton, stated: “There were simply no differences” between the quercetin and placebo groups. The professor of kinesiology at the University of Georgia added, "It just does not improve endurance."

Take the next step in your training regimen: Try any BRL Sports supplement risk-free! If our natural nutritional products aren’t the best you’ve ever used, simply return your purchase for a 100% refund — no questions asked!



Also in Inspiration & Perspiration

a woman training in a gym with her coach
Is a Professional Coach Worth It? The Real Deal on Coaching for Endurance Athletes

by Future Tilt February 07, 2025 4 min read

Is endurance coaching worth it? Explore the costs, benefits, and decide if a coach is right for you.

Read More
image of someone's feet, one with a shoe and one out of the shoe
8 Essential Exercises to Bulletproof Your Feet and Ankles for Running

by Future Tilt February 07, 2025 3 min read

Strong feet & ankles = injury-free running. These 8 essential exercises will boost performance and keep you running strong.

Read More
image of a cup of cherry juice with a pitcher and a bowl of fresh cherries
Top 5 Benefits of Drinking Tart Cherry Juice for Endurance Athletes

by Future Tilt February 07, 2025 3 min read

Boost endurance with tart cherry juice. Reduce soreness, sleep better, sharpen focus, and support immunity. A delicious and healthy performance enhancer.

Read More

Get the Inside Scoop