Obes Rev · 2005
Adverse events of herbal food supplements for body weight reduction: systematic reviewYerba Mate side effects
Across 136 first-hand reports, people mentioned a side effect 9 times (about 7 per 100 reports). The most common: stomach issues, brain fog, drowsiness. User reports show what people notice — they can't tell you whether Yerba Mate is safe for you.
Reported side effects
stomach issues2
brain fog1
drowsiness1
jitteriness1
anxiety1
headache1
cancer risk1
insomnia1
In their own words
“often i feel shitty from yerba, my stomach hurts and i'm foggy and tired.”
“Yerba Mate makes me euphoric, that's some sort of high, also boosts my exercise performance even better than rhodiola!”
Is Yerba Mate safe? What the research covers
AResearch: Strong7 meta-analyses · 16 randomized trials on PubMed