L-Argnine is an amino acid that can clear clogged arteries, google it, not recommended though for those that have had a heart attack already, it’s the modern wonder of of the heart.
Spelled it wrong, that’s “L-Arginine” I take 500 mg a day, but take breaks from it.
Did they say why it’s not recommended if one already had a heart attack?
Found this too:
"People with kidney disease and those who take ACE inhibitors or potassium sparing diuretics should not use supplemental L-arginine unless they are under professional supervision."
Anyone deciding to take it should probably do some reading first, as you suggest.