Under ordinary conditions the body makes enough tyrosine on its own. Under acute stress — cold, noise, sleep loss, sustained mental load — catecholamine turnover rises and available tyrosine can become a limiting factor. Supplemental tyrosine is thought to restore that substrate pool so synthesis can keep pace with demand.

The clearest finding across this literature is that tyrosine helps most when someone is depleted, and does very little when they aren't. Trials in military and laboratory settings have shown preserved working memory and cognitive flexibility under stressors like cold exposure and sleep deprivation, while studies in rested, unstressed participants generally show no benefit. It is best understood as a buffer against decline rather than an enhancer of baseline performance.

Included for the demanding end of the use case — long shifts, hard training blocks, short sleep — rather than for a lift on an ordinary day.

L-theanine crosses the blood-brain barrier and increases alpha-band brainwave activity, a pattern associated with relaxed, wakeful attention. It appears to modulate glutamate and GABA signaling, which is the leading explanation for why it takes the jagged edge off caffeine without cancelling the alertness.

The combination is better supported than either compound by itself. In a controlled trial, 97 mg of L-theanine with 40 mg of caffeine improved accuracy during task switching and raised self-reported alertness while reducing tiredness, though other measures like visual search and choice reaction time were unchanged. Later work using a higher 200 mg / 160 mg pairing in sleep-deprived adults found improved hit rate and better discrimination between targets and distractors versus placebo. Notably, several studies find theanine alone produces no measurable cognitive effect — the pairing is the active variable.

Paired with caffeine specifically to shape the character of the energy: sustained attention instead of jitter.

Caffeine blocks adenosine receptors. Adenosine accumulates through the day and signals fatigue; occupying those receptors delays the perception of tiredness and permits higher central nervous system output. It also modestly increases catecholamine release and reduces perceived exertion during exercise.

Effects on vigilance, reaction time, and endurance performance are among the most replicated in sports and cognitive science, with benefits appearing consistently across hundreds of trials. Dose-response is real but not unlimited — benefits plateau and side effects climb past roughly 400 mg per day for most adults. Habitual users develop partial tolerance to the alertness effect, though endurance benefits appear more durable.

The primary driver of acute energy in the formula, deliberately paired with L-theanine rather than used alone.

Alpha-GPC delivers choline in a form that crosses the blood-brain barrier readily. More available choline supports acetylcholine synthesis, and acetylcholine signaling underpins attention, memory encoding, and neuromuscular activation.

Alpha-GPC has meaningful support in clinical populations — a 180-day trial in mild-to-moderate Alzheimer's used 400 mg three times daily with positive results — but evidence in healthy people is genuinely thin, and most such studies have not found cognitive benefit. A 2024 randomized crossover trial in 20 resistance-trained men testing 315 mg and 630 mg doses found faster response times on inhibition tasks at the high dose, but reduced accuracy compared with the low dose, and no significant differences across most other cognitive, physical, or hormonal measures. A separate 14-day trial at 400 mg daily improved self-reported motivation without affecting anxiety.

Included on mechanistic grounds and on the strength of the power-output literature, with the acknowledgment that cognitive data in healthy adults is still developing.

Rhodiola's active constituents, chiefly rosavins and salidroside, are thought to modulate the hypothalamic-pituitary-adrenal axis and monoamine pathways. In practice that means influencing how the body's stress response is regulated, rather than adding stimulation on top of it.

Human trials have repeatedly reported reduced mental fatigue: 170 mg daily for two weeks reduced fatigue in physicians working night shifts, and single doses of 370 mg and 555 mg both reduced mental fatigue with no clear dose-dependence between them. But a systematic review of 11 trials reached a blunt conclusion — the evidence is contradictory, and every included study carried either high risk of bias or reporting flaws that prevented proper assessment. Two of six trials found benefit for physical fatigue; three of five found benefit for mental fatigue.

Included to support performance when the demand is sustained rather than acute — the stress-resilience side of the formula.

P5P is a required cofactor in more than 140 enzymatic reactions, including the decarboxylation steps that produce dopamine, serotonin, and GABA from their amino acid precursors. Without adequate B6, neurotransmitter synthesis is rate-limited regardless of how much precursor is available.

B6's role in these pathways is settled biochemistry rather than contested nutrition science. What's less clear is whether supplementation benefits people who are already replete — the evidence for improved mood or cognition in well-nourished adults is weak. Deficiency, however, produces measurable neurological effects, and marginal status is more common than often assumed, particularly among people with high alcohol intake or certain medications.

Included as a cofactor rather than an active — it's what allows tyrosine and other precursors in the formula to convert efficiently.

NAD+ shuttles electrons through the reactions that generate ATP, and it's consumed by sirtuins and PARPs during DNA repair and metabolic regulation. NAD+ levels decline with age, and the premise behind NMN is that restoring the precursor pool restores NAD+ availability.

The first half of that premise is well supported: oral NMN reliably and dose-dependently raises circulating NAD+, roughly doubling levels after two weeks in controlled comparison against other precursors. The second half is where evidence thins considerably. A meta-analysis of randomized trials found a clear effect on blood NAD+ but no significant difference from control on most clinically relevant outcomes. A systematic review of ten trials covering 437 participants at doses from 150–1,200 mg/day found improvements in aerobic capacity in one trial of amateur athletes, dose-dependently, but no significant strength effects. Reviewers have repeatedly noted that whether raising blood NAD+ actually changes health outcomes remains unestablished.

Included to support the cellular energy pathway upstream of the more immediately felt ingredients.

Niacinamide is converted into NAD+ through the salvage pathway. Because NAD+ and NADP+ serve as electron carriers in glycolysis, the citric acid cycle, and oxidative phosphorylation, B3 status directly constrains how efficiently cells can produce ATP.

The nutrient role is beyond dispute — severe deficiency causes pellagra, and the metabolic pathways are textbook. More recent work has examined whether niacin can act as an NAD+ booster therapeutically: a 2020 Cell Metabolism study in patients with mitochondrial myopathy found niacin supplementation increased NAD+ and improved muscle metabolism and strength. Whether comparable effects occur in healthy, well-nourished people is a separate and much less settled question.

Supplies the NAD+ pathway through a well-characterized, inexpensive, well-tolerated route.

Taurine acts as an osmolyte, helping cells maintain volume and fluid balance, and it modulates intracellular calcium signaling in muscle. It also has antioxidant properties and appears to influence neuronal excitability through GABA-A receptor interaction.

Meta-analyses of exercise trials suggest small but real improvements in endurance performance, generally in the range of a few percent, with more consistent effects on time-to-exhaustion than on strength or power. Evidence for cognitive effects in humans is considerably weaker and often confounded by taurine appearing alongside caffeine in the products studied. Its role in cardiac and neural tissue is well characterized physiologically even where supplementation outcomes remain modest.

Included for the hydration and endurance side of the formula, and because it sits naturally alongside the electrolyte complex.

Glucose is co-transported with sodium across the intestinal wall via the SGLT1 transporter. Because water follows that movement osmotically, pairing a modest amount of glucose with sodium measurably increases the rate of fluid absorption — the principle behind oral rehydration solutions used clinically worldwide.

Sodium-glucose co-transport is one of the better-established findings in hydration physiology and forms the basis of WHO oral rehydration therapy. Exercise research supports carbohydrate-electrolyte solutions for endurance and rehydration, though benefits scale with duration and intensity — for short or low-intensity activity, plain water performs comparably.

Included at a low dose to enable the co-transport effect, not to supply meaningful fuel.

Sodium establishes the osmotic gradient that determines how much water stays in circulation versus being excreted. It is also the charge carrier behind action potentials, making it fundamental to nerve conduction and muscle contraction.

Sodium's role in rehydration is well quantified. Controlled work has shown that fluid retention after exercise-induced dehydration increases progressively with the sodium concentration of the drink consumed — low-sodium fluids are excreted more readily and restore plasma volume less effectively. This is why sodium content, not just fluid volume, determines rehydration outcomes.

The backbone of the electrolyte complex — the reason the product hydrates differently than water alone.

The sodium-potassium ATPase maintains the electrochemical gradient across every cell membrane, consuming a substantial share of resting energy expenditure to do so. Potassium is essential to repolarization after each action potential and therefore to sustained, coordinated muscle contraction.

Potassium's physiological necessity is not in question. Population-level evidence also links higher dietary potassium with lower blood pressure and reduced stroke risk. Most adults consume well below recommended intake, since the richest sources are fruits, vegetables, and legumes.

Included to balance the sodium content rather than supply sodium in isolation, which better reflects what's actually lost in sweat.

Magnesium is a cofactor in over 300 enzymatic reactions, including every reaction involving ATP, which is biologically active only as an Mg-ATP complex. It also modulates calcium entry into muscle cells, which is why deficiency is associated with cramping and impaired relaxation.

A 2024 systematic review of magnesium supplementation and exercise recovery found reductions in muscle soreness and improvements in recovery markers, though effect sizes varied and study quality was uneven. Deficiency is genuinely common — a meaningful share of adults consume below the recommended intake — which may explain why supplementation studies sometimes show effects and sometimes don't, depending on the baseline status of participants.

Included for recovery and neuromuscular function, in a form less likely to cause the digestive effects associated with magnesium oxide or citrate.

Ascorbate donates electrons to neutralize reactive oxygen species and regenerates other antioxidants including vitamin E. It's also a required cofactor for collagen hydroxylation and for dopamine beta-hydroxylase, the enzyme converting dopamine to norepinephrine — a direct link to the catecholamine pathway.

Vitamin C's role in immune function is well documented: it accumulates in neutrophils, supports barrier integrity, and deficiency measurably impairs immune response. Supplementation does not appear to prevent common colds in the general population, though it modestly reduces duration, with more pronounced effects in people under heavy physical stress such as marathon runners and soldiers.

Supports antioxidant defense during physical stress and contributes to the same neurotransmitter pathway the formula targets elsewhere.

Zinc is concentrated in synaptic vesicles in the hippocampus, where it modulates NMDA receptor activity and influences synaptic plasticity. Systemically, it's required for the development and function of neutrophils, natural killer cells, and T lymphocytes.

Zinc's necessity for immune function is thoroughly established, and deficiency impairs immune response measurably. Evidence that supplementation improves cognition in already-replete adults is much weaker. Zinc lozenges have moderate evidence for shortening cold duration, though this reflects a local effect in the throat rather than a systemic one, and does not transfer to a beverage format.

Included for immune and antioxidant support at nutrient-level dosing.

Fruit powders retain polyphenols, anthocyanins, and vitamin C from the source fruit, though concentrations vary substantially with the fruit, the drying method, and storage conditions.

Whole-fruit intake is consistently associated with positive health outcomes in epidemiological research. Whether small quantities of fruit powder in a beverage deliver comparable benefit is a very different question, and one the evidence does not currently answer. Polyphenol bioavailability is generally low and highly variable between individuals depending on gut microbiome composition.

Provides color and flavor without synthetic additives, with any polyphenol contribution treated as incidental rather than a primary claim.