Amino acid
Arginine
Arginine is an amino acid the body can usually make itself and also gets from protein-rich foods. The body uses it to make nitric oxide.
Also listed as L-Arginine, Arginine HCl, L Arginine, L-Arginine HCl
Plain arginine and combinations are different questions
The erectile-function review included varied preparations, while the cognition studies tested arginine silicate stabilized with inositol. A result from one combination cannot identify the effect of arginine alone. For comparing a label with a study, both the daily amount and the other ingredients matter. 1 2
What do European health claims mean here?
The German Verbraucherzentrale reports that no health claims for L-arginine have been authorized in the EU. That regulatory position does not erase the research, but a marketing promise should not be mistaken for an approved claim. 3