Numerous supplements have been studied for their effects on focus and attention. For most supplements, rigorous trials testing efficacy in large numbers of participants is lacking. Caffeine[1] and the amino acid L-theanine[2] are notable exceptions, with a large body of high-quality evidence demonstrating their efficacy for enhancing focus and attention, particularly when taken together.[3]
The following additional supplements have been studied for their effects on focus & attention:[4]
- L-Tyrosine: this amino acid has been shown to have positive effects on attention[5] and cognitive function under stressful conditions.[6]
- Omega-3 fatty acids: although omega-3 fats such as docosahexaenoic acid (DHA) are essential for, and present at high levels in, the brain, studies on the effects of omega 3 supplements on attention have reported mixed results.[7][8]
- B vitamins[9]
- Nitrates[10]
- Flavonoids and flavones[4]
- Ginkgo biloba[11]
- Ginseng[12]
- Prebiotics[13]