L-Theanine
B
4 verified direct human studies
Positive 3 · No clear difference 0 · Mixed 1 · Negative 0
Goal Browse
Focus
Ingredients linked to focus, memory, and cognitive function research.
Relevant ingredients
Creatine
C
2 verified direct human studies
Positive 2 · No clear difference 0 · Mixed 0 · Negative 0
Bacopa
C
1 verified direct human studies
Positive 1 · No clear difference 0 · Mixed 0 · Negative 0
Rhodiola
C
1 verified direct human studies
Positive 1 · No clear difference 0 · Mixed 0 · Negative 0
Ashwagandha
Not rated yet
No direct evidence for general supplement use is confirmed under the current standard.
Beetroot Extract
Not rated yet
The linked research coverage is not broad enough to confirm a tier for this goal yet.
Caffeine
Not rated yet
No direct evidence for general supplement use is confirmed under the current standard.
Coenzyme Q10
Not rated yet
The linked research coverage is not broad enough to confirm a tier for this goal yet.
Ginkgo
Not rated yet
No direct evidence for general supplement use is confirmed under the current standard.
Melatonin
Not rated yet
The linked research coverage is not broad enough to confirm a tier for this goal yet.
Omega-3
Not rated yet
No direct evidence for general supplement use is confirmed under the current standard.
Tyrosine
Not rated yet
Direct evidence for general supplement use is limited under the current standard.
2 human studies in a specific clinical context are available separately.