Sharper thinking, better memory, sustained focus without the crash. What the clinical evidence actually says about nootropics.
The cognitive focus stack is caffeine (100mg) + L-theanine (200mg) acutely, plus lion's mane (500–1000mg) and bacopa monnieri (300–600mg) for long-term neuroplasticity support. The caffeine + theanine combination is the most consistently replicated cognitive enhancement in supplement research. Lion's mane NGF stimulation and bacopa's memory consolidation effects require 4–8 weeks of consistent use to appear. This stack costs approximately $1.10/day.
ℹ️ This stack is for informational purposes only. Always consult a healthcare provider before starting supplements, especially if you take medication or have a medical condition.
The most reliable acute cognitive enhancement available without a prescription. Caffeine alone can cause anxiety and jitteriness. L-theanine (200mg) co-administered with caffeine (100mg) smooths the stimulant curve — preserving the alertness, focus, and processing speed benefits while eliminating anxiety and crash. Multiple crossover RCTs confirm the combination outperforms either alone. The 2:1 theanine:caffeine ratio is optimal.
Lion's mane contains hericenones and erinacines that stimulate nerve growth factor (NGF) synthesis in the brain. NGF supports the growth and maintenance of neurons, potentially enhancing neuroplasticity and cognitive function over time. A 2009 RCT in Phytotherapy Research found 16 weeks of lion's mane (750mg/day) significantly improved cognitive function scores in mild cognitive impairment. Requires 4–8 weeks of consistent use.
One of the most studied ayurvedic herbs for memory. The active bacoside compounds inhibit acetylcholinesterase (similar to Alzheimer's drugs, but milder) and have antioxidant and neuroprotective effects. A 2012 systematic review of 9 RCTs confirmed significant improvements in memory acquisition and retention. Works slowly — effects emerge at 4–8 weeks and peak at 12 weeks. Must be standardised to at least 45% bacosides.
DHA is the primary structural fatty acid of neuronal cell membranes. Supplementation has been shown to improve processing speed and working memory, particularly in those with suboptimal dietary DHA intake (common in non-fish-eaters). At 1,000mg DHA/day, cognitive and mood effects are consistent across multiple RCTs. More foundational than acutely noticeable.
Ginkgo Biloba: Once considered the flagship cognitive supplement. Multiple large RCTs including a 3,069-patient trial (GEMS) found no significant cognitive benefit in healthy adults. Skip. Phosphatidylserine: Some evidence in cognitive decline but not in healthy adults at standard doses. Modafinil/Racetams: Outside scope of OTC supplements. Noopept: Russian compound with modest rodent data and minimal human evidence.
1. Haskell CF et al. (2008). The effects of L-theanine, caffeine and their combination on cognition. Biological Psychology. 2. Mori K et al. (2009). Improving effects of Lion's Mane on cognitive function. Phytother Res. 3. Pase MP et al. (2012). Bacopa monnieri for memory and cognitive function. J Ethnopharmacol.
9 evidence-based supplement combinations for muscle, sleep, fat loss, cognition and more.
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