The best replacement for agmatine is citrulline.

The best alternatives to agmatine are rated as following:
★★★★★  citrulline
★★★★★  arginine
★★★★★  aakg
★★★★  hemavol
★★★★  nitrates
★★★★  l-arginine
★★★  beta alanine
★★  gplc
★★  arginine nitrate
★★  citrulline malate
★★  glycergrow
★  potassium nitrate
★  l citrulline
★  l arginine

Your alternative for agmatine is not listed? Suggest!
Speaking about agmatine, one probably shouldn't forget about citrulline.

Other search terms related to agmatine and their ratings are:
★★★★★ citrulline
★★★★ craze
★ citrulline malate
You have in mind a companion for agmatine and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of agmatine in all years. Click on graph for more.
agmatine
citrulline
arginine