Are you still taking Agmatine 500 mgs and seeing mild positive effects? Thanks for letting us know.
Yes, absolutely! Current pre-cycling stack before a 1-2 hr workout 3-4 times a week is as follows.
250 mgs of... L-Citrulline
500 mgs of... NAC, L-Carnitine L-Tartrate, Acetyl L-Carnitine, Agmatine, Taurine
750 mgs of... Beta Alanine, L-Arginine HCL
2.5 Grams of... Beet Root Powder, Red Spinach Extract
5 Grams of... D-Ribose
So to separate out Agmatine is virtually impossible, however I have no problems with this stack. As a rough gauge of exercise efficiency, my current VO2max is estimated to be 43, which is rated "excellent" for my age, my wife's is 45, which is rated "superior" for her age, and she uses the same stack. And weight is down a bit since April, HR is lower, all stats are actually improving. I wouldn't attribute too much of this to Agmatine, but it's in the mix and doing something.