L-citrulline is an amino acid that may help treat erectile dysfunction by increasing the production of nitric oxide ( 2 ). Nitric oxide is needed for the muscles in the penis to relax. In several studies, a combination of L-arginine and Pycnogenol significantly improved sexual function in men with ED ( 5 , 6 , 7 , 8 ).
Oops!
Oops, you forgot something.