Does L-arginine make you hard?

One small study reported that after one month of treatment with a combination of L-arginine and pycnogenol, only 5% of study participants experienced better erections. But after three months of treatment, nearly 93% of men could experience a normal erection (Stanislavov, 2003).

How much L-arginine should I take for erectile dysfunction?

Dosage and how to take

In those with erectile dysfunction, research has suggested that supplementing daily with 1.5–5 grams of L-arginine may significantly improve symptoms ( 15 , 22).

Does L-arginine help last longer in bed?

Some study results on L-arginine for ED have been promising, like one 2019 study where researchers found that dosages between 1500–5000 milligrams offered significant improvements in ED over placebo, with improved self-reported scores of sexual satisfaction and erectile function submitted by the participants.