L-Theanine100–200 mg · any
Puts you in a calm-but-alert state — steady attention without the jitter of caffeine.
Strong · 1 study, positiveResearch →
brain cognitive · symptom
Lack of Focus
Attention slides off whatever you are trying to do.
Top proven supplements
Studied in people, at a dose you can actually buy.3Studied in people, at a dose you can actually buy.
Rhodiola200–400 mg · morning
Steadies your stress response and supports the brain chemicals that hold attention.
Solid · 2 of 2 studies agreeResearch →
Omega-31000–2000 mg · with_food
Supports the part of the brain that runs planning and attention.
Solid · 1 study, positiveResearch →
Might help
Real research, but thin or split. Worth knowing, not worth counting on.1Real research, but thin or split. Worth knowing, not worth counting on.
L-Tyrosine500–1000 mg · morning
The raw material for dopamine. Under stress you burn through it, and topping up keeps focus from sliding.
Evidence · 3 of 3 studies agreeResearch →
No research yet
People take these for it. We haven’t found trials we would stand behind.3People take these for it. We haven’t found trials we would stand behind.
Zincany
No trials we can vouch forResearch →
Iodine150 mcg · any
No trials we can vouch forResearch →
Nicotinamide1000 mg · any
No trials we can vouch forResearch →