Science & Tech · Gadgets & EVs · 2 hrs ago
Doctors question evidence behind Deepinder Goyal’s Temple fitness wearable
Zomato co-founder Deepinder Goyal has launched Temple, a wearable device attached to the side of the forehead with adhesive patches.
Priced at Rs 85,000, it uses optical sensors to track signals linked to blood flow to the brain.
Goyal says Temple is a fitness and AI device, not a medical tool, and says it is not proven to diagnose or prevent disease.
Doctors and other critics have questioned the evidence behind its claims and whether the readings show how healthy a person’s brain is.
Early research has compared its BrainFlow readings with Transcranial Doppler, but the findings do not establish it as a validated diagnostic tool.
The debate matters because users should not treat its readings as a substitute for medical advice.
Doctors are questioning whether Deepinder Goyal’s Temple wearable can reliably track blood flow to the brain, saying its claims lack sufficient peer-reviewed evidence.
Goyal says Temple is a fitness and wellness device, not a medical device, and says it makes no medical claims.
The wearable attaches to the side of the head and is priced at about US$900; the Indian Express reports a price of Rs 85,000.
Temple says its BrainFlow and Entropy metrics are based on emerging science and that more research will follow.
Some Indian athletes, including badminton player P.V. Sindhu and cricketer Shubman Gill, have been seen wearing the device.
- Who
- Deepinder Goyal developed Temple; doctors and other medical experts have questioned its claims.
- What
- Temple is a wearable fitness and wellness tracker that claims to measure brain blood flow and other body metrics. Doctors say evidence for its capabilities is not yet sufficient.
- When
- It became commercially available in November 2026; Goyal said it had received orders from more than 62 countries since November 1.
- Where
- The criticism and debate are taking place in India, including on television and social media.
- Why
- Doctors say the device’s claims are not backed by enough peer-reviewed research and have called for scrutiny. Goyal says it is not a medical device.
Doctors questioning Temple
Deepinder Goyal and Temple
Evidence
Doctors questioning Temple
Doctors say the device’s capabilities are not backed by sufficient peer-reviewed research.
Deepinder Goyal and Temple
Goyal says Temple is a fitness and wellness device and that it makes no medical claims.
Regulation
Doctors questioning Temple
Some doctors have called for the device to come under medical regulators’ oversight.
Deepinder Goyal and Temple
Goyal says it does not diagnose or prevent disease or replace medical advice.
Goyal said Temple had received orders from more than 62 countries since this date.
The Indian Express and The Hindu published reports on doctors’ scrutiny of Temple.
The Straits Times reported the dispute between Goyal and doctors over the device’s claims.
- Price
- US$907, according to the Straits Times; Rs 85,000, according to the Indian Express
- Size
- Less than 2.54cm wide and under 2 grams
- Placement
- Attached to the side of the head between the forehead and ear
- Founder
- Deepinder Goyal, co-founder of Zomato
- Funding
- Temple raised US$54 million in February at a valuation of about US$190 million
- Athletes
- P.V. Sindhu and Shubman Gill have been seen wearing Temple
3 sources
What people are saying
Doctors primarily see things from a medical lens, so they see every claim as a medical claim. I repeat – Temple is strictly a fitness + AI device, and we’ve made no medical claims. Temple is not proven to diagnose or prevent any disease. It doesn’t do anything that replaces the need for you to see a doctor.
People must be aware of wellness hacks such as wearables also, even though they are not marketed as health devices.
gimmick
with emerging science
Posts on X
Temple is an ambitious project. The team is delusional enough to think we can build this. And we will. Here's what we are building. Join the ride.