The science
behind FOCUS.

L-Theanine is a non-proteinogenic amino acid found primarily in Camellia sinensis (tea). It crosses the blood-brain barrier and increases alpha-wave activity in the brain, promoting a state of relaxed alertness. L-Theanine modulates levels of GABA, serotonin, and dopamine, and is known to counterbalance the overstimulatory effects of stimulants — reducing jitters while preserving cognitive enhancement.

A randomised placebo-controlled study in middle-aged and older subjects found that L-Theanine reduced reaction time on attention tasks and increased correct answers in working memory assessments. A meta-analysis of five RCTs involving 148 healthy adults confirmed dose-dependent improvements in rapid visual information processing. The evidence is strongest in combination with stimulants: a study combining 97mg L-Theanine with 40mg caffeine significantly improved accuracy during task-switching and reduced self-reported tiredness. In the ZN·1 FOCUS formulation, L-Theanine is paired with paraxanthine to provide this synergistic effect.

Alpha GPC is the most bioavailable oral source of choline, a precursor to acetylcholine — the neurotransmitter most directly linked to learning, memory formation, and muscle contraction. Alpha GPC crosses the blood-brain barrier efficiently and raises both plasma and brain choline levels, supporting cholinergic neurotransmission. It also contributes to cell membrane phospholipid synthesis.

A 2024 randomised placebo-controlled study found that acute Alpha GPC supplementation significantly enhanced cognitive performance in healthy men, measured by improvements in Stroop test scores and completion times. A systematic review and meta-analysis of clinical trials confirmed that Alpha GPC enhances memory and cognitive function and provides greater and more sustained cognitive benefits than citicoline, another choline source. Alpha GPC has also been shown to increase motivation in a single-blind human study.

Panax Ginseng is an adaptogenic herb whose active compounds — ginsenosides — modulate the hypothalamic-pituitary-adrenal (HPA) axis, supporting the body's stress response while enhancing cognitive endurance. Ginsenosides interact with GABAergic, glutamatergic, and cholinergic systems, contributing to neuroprotection, improved cerebral circulation, and sustained mental performance under pressure. Standardised to 5% ginsenosides, HPLC verified.

A randomised, double-blind, placebo-controlled trial demonstrated that Panax Ginseng improved cognitive performance in subjects with mild cognitive impairment over six months, with particular benefits in visual memory. In healthy individuals, a 200mg dose significantly improved Serial Sevens subtraction task performance and reduced subjective mental fatigue during sustained mental activity. Current evidence supports ginseng as a cognitive enhancer especially under conditions of mental load and fatigue.

Vitamin B6 in its bioactive coenzyme form (P-5-P) is an essential cofactor in over 140 enzymatic reactions, including the synthesis of key neurotransmitters: serotonin (from 5-HTP), dopamine (from L-DOPA), GABA (from glutamate), norepinephrine, and histamine. P-5-P is the form directly usable by the body, bypassing hepatic conversion required by standard pyridoxine. It also plays a role in homocysteine metabolism, amino acid transport, and immune function.

Vitamin B6 deficiency is directly linked to neuropsychiatric symptoms including cognitive impairment, depression, seizures, and peripheral neuropathy. A high-dose supplementation study published in Human Psychopharmacology found that B6 significantly reduced anxiety and strengthened visual surround suppression, suggesting enhanced GABAergic inhibition. B6's role as a rate-limiting cofactor in neurotransmitter production makes it an essential inclusion in any nootropic formulation — ensuring the neurochemical pathways activated by other ingredients can function optimally.

Methylcobalamin is the neurologically active form of Vitamin B12. It serves as a cofactor for methionine synthase, which is critical for myelin synthesis, DNA methylation, and homocysteine clearance. Methylcobalamin promotes nerve cell survival, supports remyelination of damaged neurons, and facilitates neurite outgrowth through activation of Erk1/2 and Akt signalling pathways. Unlike cyanocobalamin, methylcobalamin does not require hepatic conversion and has superior retention in neural tissue.

A systematic review and meta-analysis confirmed that B12 supplementation is protective against neurological deterioration in deficient individuals. Research published in Frontiers in Pharmacology demonstrated that methylcobalamin enhances nerve repair and improves functional recovery after traumatic brain injury by inhibiting ER stress-induced neuron injury. A comprehensive review established that B12 holds a unique nerve-regenerating role, promoting remyelination and restoration of physiological nerve conduction velocity. In the ZN·1 FOCUS stack, methylcobalamin provides foundational neural support — ensuring optimal nerve conduction and energy metabolism.