L-arginine is an amino acid that may help promote blood flow, athletic performance, and wound healing, among other benefits. But taking L-arginine supplements may interact with certain medications.

Chances are, if you think you (ED), you’ve already looked into dietary supplements — and pretty much any option other than seeing a healthcare professional.

Dosage Most research suggests L-arginine supplements are well-tolerated in doses of up to 9 grams (g) per day. However, L-arginine supplements have been shown to be safe to take in oral doses ...