Research & Ingredient References

Research References

Coffee Fruit Extract (CognatiQ®)

CognatiQ® is a whole coffee fruit extract, and it anchors the formula for a reason: it's one of the few ingredients studied for its effect on BDNF — a protein involved in the growth and maintenance of neurons — as well as working memory, processing speed, response inhibition, and sustained cognitive performance. That mix of a long-term mechanism and in-the-moment clarity is why we chose it. We included 200 mg per serving deliberately to support both acute cognitive performance and longer-term brain health pathways.

1. Reyes-Izquierdo T, et al. (2013). Modulatory effect of coffee fruit extract on plasma levels of brain-derived neurotrophic factor in healthy subjects. British Journal of Nutrition. Single oral dose in healthy adults; measured plasma BDNF. PubMed 23312069
2. Reyes-Izquierdo T, et al. (2013). Stimulatory effect of whole coffee fruit concentrate powder on plasma levels of total and exosomal brain-derived neurotrophic factor in healthy subjects: an acute within-subject clinical study. Food and Nutrition Sciences. Single dose, placebo- and coffee-controlled; measured total and exosomal plasma BDNF. Full text
3. Robinson JL, et al. (2020; published online 2019). Cognitive short- and long-term effects of coffee cherry extract in older adults with mild cognitive decline. Aging, Neuropsychology, and Cognition. 28-day RCT in older adults; measured acute and sustained cognitive performance. PubMed 31829793
4. Robinson JL, et al. (2021). Neurophysiological effects of whole coffee cherry extract in older adults with subjective cognitive impairment: a randomized, double-blind, placebo-controlled, cross-over pilot study. Antioxidants. Crossover pilot; measured brain functional connectivity, BDNF, and neurometabolites by 7T neuroimaging. Full text (PMC)
5. Robinson JL, et al. (2024). Whole Coffee Cherry Extract Improves Working Memory and Response Inhibition: Acute and Longitudinal Results from a Remote, Randomized, Double-Blind, Placebo-Controlled Clinical Trial. Nutrients. Remote RCT; measured working memory and response inhibition acutely and over 28 days. PubMed 39064791 | Full text (PMC)

Citicoline (Cognizin®)

Cognizin® is a patented form of citicoline, a compound the body uses to build and maintain brain cell membranes. We chose it because it works across the timescales we care about: it's been studied for memory — including episodic memory and recall in healthy older adults — for attention and cognitive control day to day, and for brain energy metabolism and phospholipid (membrane) metabolism, the structural side of long-term brain health. We included 500 mg per serving deliberately to support memory and daily cognitive performance now, and brain energy and membrane health over the long term.

1. McGlade E, et al. (2012). Improved attentional performance following citicoline administration in healthy adult women. Food and Nutrition Sciences. 28-day study in healthy women; measured attentional performance. Full text
2. Nakazaki E, et al. (2021). Citicoline and Memory Function in Healthy Older Adults: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial. Journal of Nutrition. RCT in healthy older adults; measured episodic and overall memory. PubMed 33978188 | Full text (PMC)
3. Silveri MM, et al. (2008). Citicoline enhances frontal lobe bioenergetics as measured by phosphorus magnetic resonance spectroscopy. NMR in Biomedicine. 6-week study in healthy mid-life adults; measured frontal-lobe energy metabolites by 31P-MRS. PubMed 18816480
4. Babb SM, et al. (2002). Chronic citicoline increases phosphodiesters in the brains of healthy older subjects: an in vivo phosphorus magnetic resonance spectroscopy study. Psychopharmacology. 6–12 week study in healthy older adults; measured brain phospholipid metabolites by 31P-MRS. Full text

L-Theanine (Suntheanine®)

Suntheanine® is Taiyo's patented pure L-theanine, and it's central to the calm focus the drink is built around — the ingredient best known for smoothing the edge off caffeine. It's researched for relaxed alertness, alpha-wave activity, stress support, attention, and sleep quality. We included 200 mg per serving deliberately, paired with the naturally occurring caffeine from matcha, so the lift feels steady and clear rather than jittery.

Browse the official Suntheanine® research archive →

Suntheanine®-specific research

1. Juneja LR, et al. (1999). L-theanine — a unique amino acid of green tea and its relaxation effect in humans. Trends in Food Science & Technology. Reported alpha-wave (relaxed-alertness) brain activity following L-theanine intake. Full text
2. Kimura K, et al. (2007). L-Theanine reduces psychological and physiological stress responses. Biological Psychology. Double-blind study; measured heart rate and salivary stress markers during an acute stress task. PubMed 16930802
3. Higashiyama A, et al. (2011). Effects of L-theanine on attention and reaction time response. Journal of Functional Foods. Placebo-controlled study; measured attention and reaction-time performance. Full text
4. Hidese S, et al. (2019). Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial. Nutrients. RCT in healthy adults; measured stress-related symptoms and cognitive performance. PubMed 31623400 | Full text (PMC)
5. Baba Y, et al. (2021). Effects of l-Theanine on Cognitive Function in Middle-Aged and Older Subjects: A Randomized Placebo-Controlled Study. Journal of Medicinal Food. RCT in middle-aged and older adults; measured cognitive performance and reaction time. PubMed 33751906

L-theanine + caffeine

1. Owen GN, et al. (2008). The combined effects of L-theanine and caffeine on cognitive performance and mood. Nutritional Neuroscience. Measured cognitive performance and mood with L-theanine and caffeine in combination. PubMed 18681988
2. Haskell CF, et al. (2008). The effects of L-theanine, caffeine and their combination on cognition and mood. Biological Psychology. Measured cognition and mood with L-theanine, caffeine, and their combination. PubMed 18006208
3. Giesbrecht T, et al. (2010). The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness. Nutritional Neuroscience. Measured cognitive performance and subjective alertness with the combination. PubMed 21040626
4. Foxe JJ, et al. (2012). Assessing the effects of caffeine and theanine on the maintenance of vigilance during a sustained attention task. Neuropharmacology. Measured sustained attention and vigilance over time with caffeine and theanine. PubMed 22326943

Lion's Mane (Fruiting Body)

Lion's Mane has been used for centuries in traditional East Asian wellness practices, and it has become an active area of modern mushroom research for cognition and mood. We deliberately chose a high-quality, dual-extracted fruiting body extract (≥20% beta-glucans). Human clinical research is still developing — the studies below span different populations, preparations, and amounts, with encouraging findings alongside studies that found no significant effect. We share the research transparently as a promising, fast-growing area of science rather than settled science.

1. Mori K, et al. (2009). Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial. Phytotherapy Research. 16-week RCT in adults aged 50–80; measured cognitive-scale scores. PubMed 18844328
2. Saitsu Y, et al. (2019). Improvement of cognitive functions by oral intake of Hericium erinaceus. Biomedical Research. 12-week randomized, placebo-controlled study in adults aged 50–80; measured cognitive-scale scores. Full text
3. Docherty S, et al. (2023). The Acute and Chronic Effects of Lion's Mane Mushroom Supplementation on Cognitive Function, Stress and Mood in Young Adults: A Double-Blind, Parallel Groups, Pilot Study. Nutrients. Acute and 28-day pilot in young adults; measured cognitive performance, stress, and mood. PubMed 38004235 | Full text (PMC)
4. Nagano M, et al. (2010). Reduction of depression and anxiety by 4 weeks Hericium erinaceus intake. Biomedical Research. 4-week randomized, placebo-controlled study in women (~40s); measured mood, sleep, and menopause-related complaints. Full text
5. Surendran G, et al. (2025). Acute effects of a standardised extract of Hericium erinaceus (Lion's Mane mushroom) on cognition and mood in healthy younger adults: a double-blind randomised placebo-controlled study. Frontiers in Nutrition. Acute crossover study in healthy younger adults; measured cognition and mood (no significant overall effect). PubMed 40276537 | Full text (PMC)

Cordyceps (Fruiting Body)

Cordyceps has a long history of traditional use and has been studied for supporting energy, oxygen utilization, and exercise performance. We include a fruiting body extract (≥20% beta-glucans) because steady energy and resilience help sustain mental clarity and focus throughout the day — not just during physical effort. While direct human research on cognitive outcomes is still emerging, its studied effects on exercise tolerance and oxygen utilization make it a meaningful addition for overall vitality and sustained performance.

1. Hirsch KR, et al. (2017). Cordyceps militaris improves tolerance to high-intensity exercise after acute and chronic supplementation. Journal of Dietary Supplements. RCT measuring tolerance to high-intensity exercise (Cordyceps militaris). PubMed 27408987
2. Chen S, et al. (2010). Effect of Cs-4 (Cordyceps sinensis) on exercise performance in healthy older subjects: a double-blind, placebo-controlled trial. Journal of Alternative and Complementary Medicine. RCT in healthy older adults; measured exercise performance and oxygen utilization (Cordyceps sinensis, Cs-4). PubMed 20804368 | Full text (PMC)

Matcha

Matcha is our caffeine source by design. It delivers caffeine naturally bundled with L-theanine and tea catechins, creating a calmer, steadier lift than coffee. Research has explored its effects on attention, executive function, stress-related performance, and sleep quality — which is why the energy in NourishMind Clarity is designed to feel smooth and sustained rather than sharp or jittery.

1. Dietz C, et al. (2017). An intervention study on the effect of matcha tea, in drink and snack bar formats, on mood and cognitive performance. Food Research International. Measured mood and cognitive performance across drink and bar formats; modest effects on attention and memory speed. PubMed 28784536
2. Sakurai K, et al. (2020). Effects of Matcha Green Tea Powder on Cognitive Functions of Community-Dwelling Elderly Individuals. Nutrients. 12-week RCT in community-dwelling elderly adults; measured cognitive function. PubMed 33256220
3. Baba Y, et al. (2021). Matcha consumption maintains attentional function following a mild acute psychological stress without affecting a feeling of fatigue: a randomized placebo-controlled study in young adults. Nutrition Research. RCT in young adults; measured attentional function following a mild stressor. PubMed 33744591
4. Baba Y, et al. (2021). Effects of Daily Matcha and Caffeine Intake on Mild Acute Psychological Stress-Related Cognitive Function in Middle-Aged and Older Adults: A Randomized Placebo-Controlled Study. Nutrients. RCT in middle-aged and older adults; measured stress-related cognitive function. PubMed 34067795 | Full text (PMC)
5. Uchida K, et al. (2024). Effect of matcha green tea on cognitive functions and sleep quality in older adults with cognitive decline: a randomized controlled study over 12 months. PLOS ONE. 12-month RCT in older adults with cognitive decline; measured cognitive function and sleep quality. PubMed 39213264

Cocoa Flavanols

Cocoa is the base people actually crave — and we chose non-alkalized, flavanol-rich cacao so that base does double duty. Cocoa flavanols have been researched for vascular function, cerebral blood flow, and cognition. Healthy blood flow to the brain is foundational to long-term brain health, which is why we use a high-flavanol (≥7.5%), undutched cacao with strict heavy metal limits rather than standard cocoa powder. Cocoa products vary widely in flavanol content, so we specifically select one aligned with the research.

1. Brickman AM, et al. (2014). Enhancing dentate gyrus function with dietary flavanols improves cognition in older adults. Nature Neuroscience. Controlled study in older adults; measured dentate-gyrus function and cognitive performance. PubMed 25344629
2. Mastroiacovo D, et al. (2015). Cocoa flavanol consumption improves cognitive function, blood pressure control, and metabolic profile in elderly subjects: the Cocoa, Cognition, and Aging (CoCoA) Study. American Journal of Clinical Nutrition. 8-week RCT in cognitively healthy elderly adults; measured cognitive function, blood pressure, and metabolic markers across flavanol doses. PubMed 25733639
3. Sansone R, et al. (2015). Cocoa flavanol intake improves endothelial function and Framingham Risk Score in healthy men and women: a randomised, controlled, double-masked trial: the Flaviola Health Study. British Journal of Nutrition. Randomized, double-masked trial in healthy adults; measured endothelial function and cardiovascular-risk markers. PubMed 26348767 | Full text (PMC)
4. Grassi D, et al. (2015). Cocoa consumption dose-dependently improves flow-mediated dilation and arterial stiffness decreasing blood pressure in healthy individuals. Journal of Hypertension. Dose-response study in healthy adults; measured flow-mediated dilation, arterial stiffness, and blood pressure. PubMed 25380152

MCT Oil

MCTs are rapidly converted into ketones, which the brain can use as an alternative fuel alongside glucose. We include a modest dose of coconut-derived, high-C8 MCTs because they're a clean, keto- and Paleo-aligned energy source that fits the drink's low-sugar profile while contributing to its creamy texture. The studies below looked at cognitive performance during elevated ketone levels; we include MCTs primarily for this steady-fuel role as part of the overall latte experience.

1. Reger MA, et al. (2004). Effects of beta-hydroxybutyrate on cognition in memory-impaired adults. Neurobiology of Aging. Measured cognitive performance during elevated ketone (beta-hydroxybutyrate) levels. PubMed 15123336
2. Yomogida Y, et al. (2021). An fMRI Investigation into the Effects of Ketogenic Medium-Chain Triglycerides on Cognitive Function in Elderly Adults: A Pilot Study. Nutrients. fMRI pilot in older adults; measured cognitive function with ketogenic MCTs. PubMed 34206642 | Full text (PMC)