It's time to resync your natural rhythm.
Take before bed. Wake up with clarity. Move through your day with lasting energy.
We're inventing tools to help you reset.
TIMED-RELEASE CAFFEINE
Wake Up Pill
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Zest Wake-Up Pill
Morning Wakefulness
Zest is formulated to help you wake up alert, energized, and mentally clear — without needing to reach for coffee.
Clinical Trial Results
- In a double-blind, placebo-controlled study, participants who took the delayed-release caffeine before bed showed a 400% increase in physical readiness to move
- 71% increase in mental clarity
- 80% improvement in ease of waking — within 15 minutes of opening their eyes
- These results reflect rapid, measurable improvements across all domains of sleep inertia: physical, cognitive, behavioral, and emotional
Cognitive Performance
Zest supports faster thinking and better decision-making during the most cognitively vulnerable part of your day: right after waking.
Clinical Trial Results
- Participants had significantly faster reaction times on the psychomotor vigilance test (PVT)
- Showed improved neurobehavioral performance vs placebo — even after just 4 hours of sleep
- This marks the first time a proactive, time-synced caffeine product has shown improvements in objective cognitive metrics immediately post-wake
Mood & Emotional Well-Being
Zest promotes a positive emotional state upon waking, helping you start your day with motivation and mental resilience.
Clinical Trial Results
- On the PANAS (Positive and Negative Affect Scale), participants reported a significant boost in positive affect
- A trend toward reduced negative mood within 15 minutes of waking
- The caffeine formulation's effects were linked to dopamine activation in mood-related brain regions like the nucleus accumbens
Circadian Alignment
Zest is designed to complement your natural biological rhythms — amplifying your body’s natural cortisol spike in the morning without interfering with sleep onset.
Clinical Trial Results
- Salivary cortisol measurements showed a significant increase in cortisol levels at 60 minutes post-awakening in the caffeine group vs placebo
- Aligning with the natural cortisol awakening response (CAR)
- This suggests Zest supports healthy HPA-axis function and wake-up hormone dynamics
Sleep Integrity
Zest is engineered for nighttime use — designed to activate about 8 hours later, without disrupting your ability to fall asleep.
Additionally, since the study, we've improved the formulation and capsule technology to prevent disruption of sleep from food-induced digestive activity.
Clinical Trial Results
- Despite being taken at bedtime, the formulation showed no significant impact on sleep latency, REM sleep, or sleep efficiency in a restricted 4-hour sleep window
- The only change was a minor (~17-minute) reduction in deep sleep (N3) under specific conditions where a meal was given mid-night.
- This suggests that under normal fasting conditions, Zest preserves sleep quality
Dornbierer, D.A., Yerlikaya, F., Wespi, R. et al. A novel bedtime pulsatile-release caffeine formula ameliorates sleep inertia symptoms immediately upon awakening. Sci Rep 11, 19734 (2021). View Full Study
Zest helps you take back control of your time.
Reclaim the hours you've been losing to grogginess, chaos, and crash.
Life is short, live longer with Zest
Ever with Zest