If you're intending to repeatedly go back on and take breaks from caffeine, give Lions Mane supplements a try. I can get them from the local VONS like any other vitamin, often 2 for 1. It's been a game-changer WRT mitigating caffeine withdrawal effects, and also takes the edge off the high esp. with high doses. No other negative effects observed, actually it seemed like a pointless placebo until playing with caffeine use simultaneously.