The Mystery on Deepinder Goyal’s Head: What is 'Temple' and Why is Everyone Talking About It?

If you caught Zomato CEO Deepinder Goyal’s recent appearance on the Figuring Out podcast with Raj Shamani, you probably noticed something odd. It wasn't just the business insights that caught people’s attention—it was the small, metallic device clipped to the side of his head.

Social media immediately lit up. Was it a new Bluetooth headset? A stress patch? A futuristic hearing aid?

The answer, as it turns out, is far more sci-fi. It’s called Temple, and it’s Deepinder Goyal’s latest bet on the world of longevity and biohacking. Here is everything you need to know about the mystery wearable.

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What Exactly is 'Temple'?

Temple is an experimental health wearable designed to sit on your temple (hence the name). Unlike your Apple Watch or Oura Ring, which track heart rate and sleep, Temple has a singular, very specific focus: monitoring blood flow to the brain.

Developed under Eternal (the parent entity of Zomato) and a research initiative called "Continue Research," the device is strictly in the prototype phase. Goyal himself has been "dog-fooding" (testing) the device for over a year to gather data.

The "Gravity Aging" Hypothesis

Why would anyone need to monitor brain blood flow 24/7?

Goyal’s motivation stems from a concept he calls the "Gravity Aging Hypothesis." The theory suggests that humans spend the vast majority of their lives upright (standing or sitting). Over decades, gravity constantly pulls blood downward, potentially starving the brain of optimal blood flow.

Goyal believes this gravitational pull might be a silent accelerator of aging and cognitive decline. The Temple device is designed to test this theory by tracking how cerebral blood flow changes throughout the day, during stress, and perhaps most importantly, during sleep or "inversion" (being upside down).

Is It a Medical Breakthrough or a Billionaire’s Toy?

The internet is divided, and so is the medical community.

• The Proponents: Biohackers and longevity enthusiasts are intrigued. If we can prove that blood flow correlates directly with cognitive decline, devices like Temple could help us optimize our daily habits to keep our brains "younger" for longer.

• The Skeptics: Medical experts have been quick to weigh in with caution. Notably, a doctor from AIIMS (All India Institute of Medical Sciences) recently criticized the device on social media, labeling it a "toy" with "zero scientific standing." Critics argue that cerebral blood flow is complex and cannot be accurately measured by a simple skin-surface wearable without more rigorous, peer-reviewed clinical validation.

Can You Buy One?

No. As of early 2026, Temple is not a consumer product.

Goyal has made it clear that this is currently a personal research project. There is no release date, no price tag, and no guarantee it will ever hit the market. It is part of a growing trend of tech billionaires (like Bryan Johnson with his Blueprint protocol) investing millions into "solving" death and aging.

The Verdict

Whether Temple is the next frontier in health tech or just an eccentric experiment remains to be seen. However, it signals a massive shift in the wearable market: we are moving from counting steps to monitoring our biology at a cellular level.

What do you think? Would you wear a device on your head 24/7 if it promised to keep your brain young? Let me know in the comments!

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Would you like me to find more details on Deepinder Goyal's diet and fitness routine that complements this device?