Evidence Level
Pine Bark Extract (Pycnogenol) is a well-researched supplement supported by numerous clinical studies. For men's health, Stanislavov and Nikolova (2003) demonstrated that Pycnogenol combined with L-arginine significantly improved erectile function in men with organic erectile dysfunction. The mechanism involves Pycnogenol's ability to stimulate eNOS and increase nitric oxide production, which is enhanced by L-arginine as a substrate for NO synthesis. Subsequent studies by Stanislavov et al. (2008, 2014) confirmed these findings in larger populations.
Beyond sexual health, Pycnogenol has strong evidence for cardiovascular protection. Enseleit et al. (2012) conducted a double-blind RCT showing improved endothelial function in patients with coronary artery disease. Additionally, Liu et al. (2004) demonstrated glycemic benefits as an adjunct to diabetes medication.
Recent studies highlight Pycnogenol's impact on inflammation and oxidative stress. Bayer et al. (2025) found that Pycnogenol supplementation significantly reduced salivary MMP-8 and serum IL-6 levels in a randomized, double-blind trial. Belcaro et al. (2013) showed that daily intake of 50 mg of Pycnogenol lowers plasma reactive oxygen metabolites in healthy smokers.
Pycnogenol also supports cognitive function. Belcaro et al. (2014, 2015) reported improvements in attention and mental performance in healthy adults aged 35-70, with reductions in oxidative stress. These findings underscore Pycnogenol's multifaceted benefits across men's health, cardiovascular protection, inflammation reduction, and cognitive enhancement.