alpha-waves
2 interactions related to alpha-waves
l-theanine + caffeine
L-theanine, an amino acid from tea, appears to smooth out caffeine's stimulant effects by promoting alpha-wave brain activity associated with relaxed alertness, while caffeine blocks adenosine receptors to increase arousal. Human trials and a meta-analysis suggest the combination can improve sustained attention and reaction time more than either alone, with fewer of caffeine's jittery side effects.
l-theanine + magnesium
L-theanine and magnesium are both gentle, non-sedating relaxants that act on the same nervous-system pathways from different angles: L-theanine raises alpha-wave activity and modestly increases GABA, serotonin and dopamine, while magnesium dampens NMDA-receptor excitation and supports GABA-A signalling. A single preclinical study (Dasdelen et al., Frontiers in Nutrition, 2022) found a magnesium-L-theanine complex outperformed L-theanine alone in rats, but no human trial has tested the combination, so the pairing is reasonable rather than proven synergistic in people.