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Productivity

Getting more done, at work or in daily tasks. It is measured by output on set tasks and by self-reported questionnaires, and it depends heavily on the task being measured.

10 supplements analyzed and ranked by clinical evidence.

Supplements10

Supplement Evidence

Iron
Strong

Hb+stores

anemia/fatigue

productivity gains

3022 studies·16 benefits
Caffeine
Strong

Reaction time + mood

Memory/attention + endurance

Driving/sport speed +10%

736 studies·11 benefits
L-Tyrosine
Strong

Cognition +14.4kg

Motor time -1.9h

Tyrosine depletion impairs

3252 studies·11 benefits
Theanine
Moderate

Attention/RT +15–50 ms

Memory accuracy +

39 studies·15 benefits
Huperzine A
Moderate

Cognition +11 pts

Daily function +2.4

Memory +11 pts

12 studies·9 benefits
Citicoline
Weak

Attention/motor speed +

Impulsivity -

76 studies·14 benefits
D-Serine
Weak

Faster negative emotion recognition

Slight recall improvement

20 studies·10 benefits
Guarana
Weak

Reaction-time gains -17 ms

Agility faster -3.4%

16 studies·9 benefits
Lion's Mane
Weak

Speed +6.7%; stress −9.5

Recall worsened

2 studies·5 benefits
NADH
Weak

Better cognition, less sleepiness

4 measures improved

157 studies·16 benefits