Dave Asprey's Nervous System Biohack

"The ZenBud uses ultrasound to stimulate my vagus nerve so I can roll easy into my next event, keeping me grounded, clear, and focused. It works better than electric stimulation (and doesn't hurt!). Plus, it's more affordable."

DAVE ASPREY

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1.2K Reviews • 4.5 Average rating

No electrical shock

90-Day money-back guarantee

You Quantify Everything but Are You Optimizing It?

You track your sleep, stress, and heart rate variability (HRV), but what if you could actually improve those numbers in real time? ZenBud is the first commercially available wearable that uses ultrasound to stimulate your vagus nerve and unlock a new level of biohacking recovery.

With just a few minutes a day, you can experience measurable improvements in HRV, deeper calm, and faster stress recovery backed by science and felt within minutes.

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Feel Calm, Naturally

ZenBud is a vagus nerve stimulator, a lightweight wearable that sits like a headset and uses focused ultrasound to help activate your body's natural calm response. The same technology used safely in medical imaging for decades, now in your hands.

Not electrical— ultrasound reaches deeper without discomfort

Not a drug— works with your body's own relaxation pathways

Not complicated— one button, works from the first session

CE certified— built to medical-grade safety standards

90-Day— Money-Back Guarantee

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Why ZenBud Works

ZenBud is engineered for peak optimization whether you’re tracking HRV, mastering breathwork, or seeking calm on command. If you:

Want to Boost HRV Without Stimulants You track your HRV but rely on breathwork, supplements, or hacks to improve it. ZenBud naturally activates your vagus nerve to support better HRV in minutes. No pills, no stimulants.

Look for Ways to Accelerate Recovery Through Nervous System Training

Struggle to Lower Cortisol or Enter a Calm, Focused State

Prefer Clean, Silent Tech That's Backed by Science

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