The Science
You've been running on broken fuel.
Most people drink caffeine their whole lives without realising how it actually works. Here's what happens inside your liver — and why we built something different.
01 · The caffeine problem
Three metabolites. You only came for one.
Your liver's CYP1A2 enzyme splits caffeine three ways. Paraxanthine — around 70–80% — is the dominant metabolite, and the one associated with alertness and focus. Theobromine (~8–10%) is the one in chocolate, a mild vasodilator. Theophylline (~4%) is a bronchodilator. So you swallow the whole molecule, wait for your liver, and take two passengers along for the ride.
What comes along for the ride
The secondary metabolites that arrive with every coffee.
Whole molecule · liver conversion · two extra metabolites
- Theobromine (~8–10%) — the one in chocolate, a mild vasodilator
- Theophylline (~4%) — a bronchodilator with a narrow comfort window
- A conversion step — the paraxanthine arrives on your liver's schedule
- A dose fixed by the cup or the can
Paraxanthine, direct
Delivered as paraxanthine — no conversion step required.
No conversion step · 200 mg per full serve
- Acts on adenosine receptors — the fatigue-signal system
- No conversion step — it arrives as paraxanthine
- No theobromine or theophylline on board
- Dose you control: 12.5 ml or 25 ml
Curves are illustrative only and do not represent measured data. Source for metabolite shares: Lelo A, et al. Br J Clin Pharmacol. 1986;22(2):177–182 (PMID 3756065).
02 · The full stack
Every ingredient. Every dose.
Per full 25 ml serve — a half capful is exactly half of every number below. No proprietary blends, no rounding, no mystery.
Paraxanthine
The heroCaffeine's dominant metabolite, delivered directly. It works on the adenosine pathway — the same fatigue-signal system caffeine acts on — which is why it registers as alertness. Because you're taking paraxanthine rather than caffeine, theobromine and theophylline don't come with it.
GeniusPure® 99% Alpha GPC
Choline sourceA choline source standardised to 99% purity, so the dose is almost entirely active compound. Choline is the raw material your body builds acetylcholine from — the neurotransmitter most associated with focused attention.
Citicoline (CDP-Choline)
Second pathwaySupplies both choline and cytidine, the latter converting to uridine — a component of neuronal membranes. Two routes of choline delivery rather than one, which is why both are in the formula.
Acetyl-L-Tyrosine
Catecholamine precursorThe acetylated form of L-tyrosine, the amino acid your body builds dopamine and noradrenaline from. Tyrosine gets drawn down under sustained cognitive load; this tops the tank up.
Huperzine A
From Chinese club mossDerived from Huperzia serrata. Included at 100 mcg to sit alongside the two choline sources in the stack. Because of its longer active duration, don't double-dose or stack Pack A Punch with other Huperzine A products.
Electroprime®
ElectrolytesSodium, potassium and magnesium. You're mixing each serve into 300 ml of water anyway, and hydration is the floor everything else stands on.
200 mg paraxanthine plus a 1.05 g nootropic stack and 500 mg electrolytes per full serve. Always read the label and use only as directed. Consult your healthcare professional if pregnant, breastfeeding, on medication, or managing a medical condition.
Full formula deep-dive →03 · How it works together
Four jobs. Six ingredients.
Paraxanthine handles the alertness. The rest of the stack covers choline, catecholamines and water.
Alertness
Paraxanthine acts on adenosine receptors — the system that carries your brain's fatigue signal.
Choline
Alpha GPC and Citicoline supply choline by two different routes. Huperzine A sits alongside them.
Catecholamines
Acetyl-L-Tyrosine supplies the precursor your body builds dopamine and noradrenaline from.
Hydration
Electroprime electrolytes, because you're drinking 300 ml of water with every serve.
04 · Keep digging
Go deeper.
Plain-English explainers, mechanism deep-dives and honest FAQs — including what the research doesn't show. The human evidence on standalone paraxanthine is early: small trials, mostly industry-funded. We say so on the pages where we cite them.