Zomato CEO’s experimental wearable faces medical scrutiny as experts demand clinical validation
When Zomato founder Deepinder Goyal appeared on Raj Shamani’s podcast wearing a metallic clip-like device on his temple, the internet exploded with curiosity. Within hours, memes flooded social media, with users joking it was everything from chewing gum to an external hard drive. But behind the viral moment lies a serious medical debate about brain health monitoring and scientific validation.
What Is the Temple Device?
Temple is an experimental wearable designed to monitor cerebral blood flow continuously and in real time. Worn on the temple region, the device tracks brain circulation, which Goyal considers a crucial indicator of neurological health, cognitive function, and aging.
Currently a research prototype under Goyal’s health-tech startup, also called Temple, the device is linked to his privately funded initiative, Continue Research. Goyal has invested approximately $25 million into the project and has reportedly been testing the device on himself for nearly a year. The startup is exploring a $50 million seed funding round with interest from investors including Steadview Capital, Vy Capital, Info Edge, and Peak XV.
The Gravity Aging Hypothesis
Goyal’s interest in Temple stems from his Gravity Aging Hypothesis, which suggests that gravity may chronically stress the heart’s ability to pump sufficient blood to the brain, potentially accelerating aging over decades. He emphasizes this hypothesis builds on over 100 scientific papers and two years of literature review with global scientists.
Goyal points to established research showing cerebral blood flow naturally declines with age, with studies indicating annual reductions between 0.3 and 0.74 percent in healthy adults and faster declines in conditions like Alzheimer’s disease.
AIIMS Doctor Raises Red Flags
Dr. Suvrankar Datta, a radiologist at AIIMS Delhi specializing in arterial stiffness research since 2017, offered sharp criticism on X (formerly Twitter). He described Temple as a “fancy toy for billionaires” with “zero scientific standing” as a medical instrument.
Dr. Datta warned against consumer spending on unproven technology, emphasizing that measurements from temporal arteries cannot replace established diagnostics like carotid-femoral pulse wave velocity, the gold-standard metric for forecasting cardiovascular mortality.
The Gap Between Innovation and Validation
Medical experts identify several critical issues with Temple’s current state:
- No peer-reviewed clinical trials comparing results with established methods like Doppler ultrasound or MRI
- Multiple confounding factors including posture, hydration, and heart rate affecting reliability
- Unproven hypothesis linking gravity directly to brain aging
- Surface-level sensor placement limiting actual brain circulation measurement
What Goyal Says About Temple
Goyal has carefully framed Temple as a research tool rather than a miracle solution. He emphasizes working with mainstream scientific literature and connecting existing research dots. If validated, he believes Temple could benefit students tracking focus, athletes managing mental load, older adults monitoring cognitive decline, and clinicians accessing additional assessment data.
Currently, Temple is not available for sale, has no announced price or launch timeline, and no confirmed regulatory pathway. Goyal has hinted at a coming-soon phase through Instagram posts, suggesting an early-access or limited research rollout.
The Bottom Line
Temple represents an ambitious research experiment at the intersection of wearable technology and brain health monitoring. However, as medical experts unanimously emphasize, the device’s claims currently outpace clinical proof.
Dr. Gaurav Tyagi, Medical Counsellor at Career Xpert, summarizes the scientific consensus: “The notion that tracking or actively increasing ‘brain flow’ with a portable device has a substantial influence on long-term brain health is not yet supported by a significant number of scientific studies.”
Until rigorous clinical trials validate Temple’s effectiveness, traditional lifestyle habits remain the most reliable approach to protecting brain health. As Dr. Datta stressed, calling out premature claims is part of researchers’ responsibility to the public.
