Focus & concentration
Holding attention on one task and not being pulled off it. It is measured with sustained-attention and reaction-time tests, and it is a narrower thing than memory or general clarity.
87 supplements analyzed and ranked by clinical evidence.
Supplement Evidence
GSH↑, concentration↑
Cognition +26%
Perfusion/working memory↑
Focused attention + faster processing
+3.5 IQ, -6.9 BPD
Better attention, memory
Improved memory/attention
Better cognition, 12.2%
Faster processing, +13.0
Hydration lifts focus +performance
Dehydration blunts attention -5%
Electrolytes improve cognition +4%
Memory/attention: better
Focus scores: +3.7
EEG/recall: improved
Attention + memory
IQ subtests + recall
Attention/processing +13, −51ms
Memory/concentration improved
Slower cognitive decline
Attention speed+accuracy
Fatigue/stress down
Attention + fast RT
Working memory + accuracy
Alertness, -tiredness
Anxiety ↓; focus unchanged
No cognitive/sedation effect
EEG shift; focus stable