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The Core System
K4
£96.00
£96.00
K4
Hydrate & Cleanse • Repair Serum • Fortify & Moisturise
The daily loop. Structured. Essential.
Built for consistency, the Core System supports skin recovery from start to finish. Three performance formulas designed to hydrate, repair, and reinforce—before effort, after exposure, and every moment in between. It’s the foundation of your routine.
Suitable For:
All skin types. Built for men who train, sweat, and recover—runners, lifters, commuters, early risers.
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What It Does
Why It Matters
Training. Showers. Stress. Cold air.
They all pull on your skin. Without recovery, that pressure compounds.
The Core System is your baseline. It protects in advance and restores after.
Consistent. Functional. Ready when you are.
When to Use
Hydrate & Cleanse — AM, PM, and post-effort
Repair Serum — After cleansing, especially post-training or exposure
Fortify & Moisturise — Before effort to prepare, after to seal in recovery
Ingredients List
Every formula includes:
K Complex™ — Ceramides, peptides, and hydrators to repair, calm, and rebuild
Cogniscent™ — A neuroscience-backed blend designed to support clarity and focus
Full INCI breakdowns are listed on each product page.
K Complex™
Otoko’s core skin recovery formulation—built into every product. K Complex™ is a clinically backed blend of ceramides, peptides, and hydrators that restores hydration, repairs the barrier, and calms irritation. Every product starts here—then adapts with targeted actives for a specific outcome.
Cogniscent™
Otoko’s core mental performance blend—designed to shift cognitive state. Built from over 200 natural compounds and tested with EEG, CNV, and fMRI, Cogniscent™ activates emotional and reward pathways to support focus, calm, and clarity. One targeted blend.
Trial-Tested
Otoko’s recovery loop is trial-tested on active men and built for real conditions. Every formula supports hydration and barrier repair before, during, and after effort—whether post-training, post-travel, or mid-routine.