Why was this study done?

Supplementing with nutrients that support nitric oxide (NO) production are known to help improve the efficiency of muscles in both athletes and non-athletes. However, when to start supplementation and how much to supplement is an unanswered question.

What did the study find?

This study found that supplementing with a natural product containing Potassium Nitrate, Quercetin, Beet Powder, Grape Extract and Spinach Powder worked best to improve athletic performance when taken over a two-week period (15 days) as opposed to taking a single dose two hours before exercise.   


The effects of multi-day vs. Single pre-exercise nitrate supplement dosing on simulated cycling time trial performance and skeletal muscle oxygenation.

Authors: Jo E, Fischer M, Auslander AT, Beigarten A, Daggy B, Hansen K, Kessler L, Osmond A, Wang H, Wes R. The Journal of Strength & Conditioning Research. 2019 Jan;33(1):217-224.

PubMed Citation PMID: 28445231