Koffein-L-Theanin-Kapseln
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Combinations of L-theanine (~100 mg) and caffeine (~40 mg) improved speed and accuracy on demanding attention tasks compared with placebo in healthy adults. [PubMed ↗] [PubMed ↗]
Caffeine helps you feel alert while L-theanine helps you stay calm. [PubMed ↗]
People taking caffeine with L-theanine reacted a bit faster on tests. [PubMed ↗]
L-theanine–caffeine blends improved sustained attention and impulse control in challenging tasks, with fMRI data showing reduced activity in brain regions linked to mind-wandering. [PubMed ↗] [PubMed ↗]
Combo helped reduce mistakes on attention-heavy tasks. [PubMed ↗]
Across multiple trials in healthy adults, theanine–caffeine combinations at common supplemental doses were well tolerated with no serious adverse events reported. [PubMed ↗] [PubMed ↗]
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