Knowledge Hub
Dr. R. Brahmananda Reddy
7 April 2026

Cognitive performance is the number one concern among working professionals in my clinic.
Caffeine + L-Theanine: The most reliably effective nootropic combination. A 2025 crossover study showed L-theanine and caffeine improved selective attention even in sleep-deprived adults.
Creatine Monohydrate: A 2024 meta-analysis found creatine improved cognitive function in memory, attention, and information processing speed. 3-5 grams daily.
Omega-3 (EPA/DHA): DHA constitutes 40% of brain polyunsaturated fatty acids. Target omega-3 index > 8%.
Citicoline: Improves attention, memory, and executive function with 250-500 mg daily.
Bacopa Monnieri: Meta-analysis of 9 RCTs showed improvements in attention, processing, and working memory. Effects take 8-12 weeks.
Lion's Mane: Stimulates nerve growth factor (NGF). RCT showed cognitive improvement in adults over 50 at 3,200 mg daily.
Racetams, alpha-GPC (stroke risk concern), and prescription stimulants (ethical and safety concerns).
Sleep, exercise, blood glucose stability, hydration, and stress management matter more than any nootropic.
At Genoryx, we assess cognitive performance with neurocognitive testing and brain-relevant biomarkers. Book a consultation and optimise the organ that runs your career.
Book your 400+ biomarker assessment — physician consultation included.
Schedule a consultationReady to know your numbers?
Schedule your consultation with our longevity physician team.
Book Your AssessmentWritten by
UK-trained physician and founder of Genoryx. Writes about longevity medicine, healthspan optimization, and evidence-based wellness.
View profile →