Zomato's Deepinder Goyal is wearing a tiny golden sensor on his forehead, and it's tied to a gravity aging theory

Deepinder Goyal, founder and Founder of Zomato, has revealed a new experimental wearable device called 'Temple', designed to monitor blood flow in the human brain. Goyal recently teased the device on social media, captioning it simply, "Coming soon." A while back, Goyal was spotted wearing the device on his forehead, which drew attention online for looking like, depending on who you ask, a piece of chewing gum, a pimple patch, or some sort of futuristic biohacking gadget? And it appears it was this temple device all alone. Now, let's dive in this article to understand the whole thing.

Temple Monitor Overview 

Coming soon. 

Follow @temple for more updates. pic.twitter.com/E7S8NeUDP4

— Deepinder Goyal (@deepigoyal)

 In a LinkedIn post, Goyal described Temple as an instrument capable of accurate, continuous, and real-time measurements of brain blood flow during daily activities, unlike conventional devices that rely on short clinical tests.  He said he has been using the Temple device for a year and feels it has the potential to become an important global health tool. A little weird part is that this Temple device is linked to Goyal's research into the “Gravity Ageing Hypothesis”, a theory suggesting that gravity's effect on blood flow, particularly reduced circulation to key brain regions when upright, may influence ageing. So, does this theory hold?

Temple and the Gravity Aging Hypothesis

Goyal's hypothesis argues that standing upright and the constant downward pull of gravity can reduce blood flow to the brain. Over the years, this could accelerate aging. To test this idea, he and his team explored whether certain "inversions"—positions or exercises where the head is placed below the heart—might improve circulation to the brain. He claims their early experiments showed that using inversion tables for 10 minutes daily over six weeks resulted in a roughly 7 per cent rise in average brain blood flow. According to Goyal, this increase might offset what would typically be a decade's worth of age-related decline.

Goyal has earlier described Temple as an “experimental device to measure Brain Flow precisely, in real-time, and continuously,” and the emphasis on "experimental" is doing a lot of work here. It's a well-known fact that accurately measuring brain blood flow through a wearable device is exceptionally challenging. To elaborate, most clinical measurements of cerebral blood flow require equipment like transcranial Doppler ultrasound or MRI, and not a tiny sensor you stick on your temple.

Goyal also revealed that he has been using the Temple device for a year and believes it remains useful even if his gravity-based ageing theory proves incorrect. He pointed out that brain blood flow is already considered a key biomarker for ageing, longevity and cognitive health. 

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Is this a product or a passion project?

According to Goyal, the hypothesis was not simply a strategy to promote the device; he has also denied any such intention. He said Temple would be a "small, cute company" compared to Eternal and made it clear that he would never risk customers' trust for marketing. He emphasised that the Gravity Ageing Hypothesis was not created to sell the device, but emerged from genuine scientific curiosity. 

Goyal seems genuinely invested in this research. He's clearly into biohacking, which is fine. But I think there's also a difference between personal experimentation and launching a consumer health product, and it's not entirely clear which category Temple falls into yet.

So far, Goyal has not announced a launch date, scientific validation data, price, availability, or technical specifications. That's a problem if you're trying to evaluate whether this is a legitimate health tool or just a very expensive way to monitor something your body might not actually need continuous tracking for. If Temple works as intended, it could be used by anyone from students to the elderly, monitoring for cognitive decline, and clinicians looking for additional data to inform their diagnoses . But that's also a lot of "ifs."

Temple Monitor Conclusion

Temple is being developed under Continue Research, a company funded by Goyal to explore the intersections of brain health, aging, and longevity. It's reportedly a $25-million personal bet on a controversial theory. Let's see how he can pull this off, and there's certainly going to be controversy surrounding it.