I haven’t heard of any negative health effects. It’s naturally found in tea, for whatever that’s worth.
I can’t put my finger on any studies that support the jitters/anxiety claim atm. Here’s one that suggests that the combination improves performance more than caffeine alone: https://pubmed.ncbi.nlm.nih.gov/18681988/
How healthy is this?
I haven’t heard of any negative health effects. It’s naturally found in tea, for whatever that’s worth.
I can’t put my finger on any studies that support the jitters/anxiety claim atm. Here’s one that suggests that the combination improves performance more than caffeine alone: https://pubmed.ncbi.nlm.nih.gov/18681988/