TSC members Dalane Kitzman, Daniel B. Kim-Shapiro, Swati Basu, Peter Brukaker, and Jack Rejeski  have published a study in the Journal of the American College of Cardiology-Heart Failure. The study found that a daily dose of beetroot juice significantly improved exercise endurance and blood pressure in elderly patients with heart failure. More about this study can be found here: http://www.eurekalert.org/pub_releases/2016-02/wfbm-ddo021116.php.