Quick answer: L-arginine feeds nitric oxide and was studied for ED at 3 to 5 g a day. Cnidium monnieri's osthole relaxes smooth muscle in lab studies, with little human research. Both need care with nitrates and ED drugs.
L-arginine
The body turns it into nitric oxide, which relaxes blood vessels. Small ED studies used grams a day. It can lower blood pressure.
Cnidium monnieri
A traditional Chinese herb. Its compound osthole relaxes smooth muscle and may affect the same pathway as ED drugs in lab work. Human trials are scarce.
Safety
Both act on blood-vessel relaxation, so combining them with nitrates or ED drugs is risky. Read the interaction guide.
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General information, not medical advice. SodaPower is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease.