caffeine ring | silver US Size:8 People who use it daily

People who use it daily wear it without irony

Round studs show the same shape with three-dimensional volume

Memory B cells survive for decades

the chain sits long enough to wear over clothing or as a longer pendant

neuroscientists studying inhibitory circuits

caffeine ring | silver US Size:8 People who use it dailyCaffeine ring sterling silver If you cannot read, write, or run a clinic before your second cup, you already know what the ring carries. Caffeine, 1,3,7 trimethylxanthine, the most consumed psychoactive drug on the planet. Worn here as a sterling silver ring in US sizes 5 to 9. The Chemistry of Caffeine Caffeine is 1,3,7 trimethylxanthine, structurally one methyl group more than theobromine (3,7 dimethylxanthine). It was first isolated from coffee