Overall antioxidant content doesn't mean much. Nor is it proven that more antioxidants in diet benefit health.
It's just what we mostly read about, since journalism has a big influence on public opinion.
That's why we think that dietary fat and cholesterol is bad for us
but it's another topic
The specific compounds are important, in this case Mangiferin content is mentioned as the main benefit of coffee leaf tea.
I searched it, it's a molecule also found in mango fruit. Here's what a study I found says:
"analgesic, antidiabetic, antisclerotic, atimicrobial and antiviral, cardio-, hepato-, and neuroprotective, antiinflammatory, antiallergic, MAO inhibiting and memory improving, as well as radioprotective against X-ray, gamma, and UV radiation"
https://www.ncbi.nlm.nih.gov/pubmed/23190031Apparently it has great effects, but the overall content and bioavalibility must be taken into account before considering coffee leaves a viable source.
This article doesn't say anything, really.
Also, catethins from green tea are thoroughly researched with to my knowledge unmatched effects, expect maybe for T.cacao.
Here's a great site for more info:
https://examine.com/supplements/Green+Tea+Catechins/Well, I would like to have both... Right now some yellow coffee seeds are germinating for that purpose, 70% rate so far
They should be more resilient than the "regular" ones.. Got them off ebay, I could PM source if someone's interested.