Mental alertness
Supplements studied for mental alertness.
Overview
Black Tea has high-strength evidence from six studies for maintaining alertness and focus during the day, mainly through its caffeine content, which boosts attention especially after poor sleep. Caffeine from coffee or supplements also improves wakefulness across 32 studies.
However, caffeine does not fully restore rested performance and most people still perform below well-rested levels. The heatmap and evidence reviews below provide further detail.
Effect graph
Subscribe to access all content
Interactive visualisations of ranked conditions and clinical benefit with purchase guidance.
Already a subscriber? Sign in
Relevant supplements heatmap
Relevant supplements sorted by DEX Score.
Subscribe to access all content
See effect size, evidence strength, and trust at a glance for every condition.
Already a subscriber? Sign in
SupplementDEX Database
2 supplements for rated at least stars. All purchase bands. No minimum star filter.
Subscribe to access all content
Read this and 2,600+ other evidence reviews on our practitioner plan.
Already a subscriber? Sign in
Evidence visualised
Subscribe to view condition evidence
Visual summaries of supplement evidence ranked by condition.
Already a subscriber? Sign in