TweetA while back a won a promo on FB from Suppz.com for VMI Sports samples.I tried Caffinity which is a blend of Caffeine aka 1,3,7- Trimethylxanthine, Infinergy aka Di-Caffeine Malate & L-Theanine. Now to start I do have a high stim tolerance. I dosed 1 seving at 6am. I believe the L-theanine helped me focus longer in a less anxious state.I also noticed a clean and natural focus with more energy later after dosage.I would rate this a 9/10.
Here is a double-blind, placebo-controlled study on this great combination. .https://www.ncbi.nlm.nih.gov/pubmed/25761837