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Deepinder Goyal Says Temple Wearable Is Not for Sale as He Addresses Medical Skepticism

He describes a temple‑mounted PPG prototype being benchmarked against MRI and Doppler to estimate cerebral blood flow.

Overview

  • Temple remains an experimental device with no commercial announcement and is months away from any public preview, according to Goyal’s post on X.
  • Goyal engaged neurologist Dr. Sudhir Kumar, who urged sensing at the neck’s internal carotid artery, while Goyal argued the temple site offers higher PPG resolution.
  • He said machine‑learning models are being trained to correlate temple signals with MRI and Transcranial Doppler measurements to infer cerebral flow.
  • Goyal criticized doctors and influencers for warning people off an unvalidated product that cannot be ordered, and said scientific data will be shared if and when a sale is pursued.
  • The project ties into Goyal’s Gravity Ageing Hypothesis and personal testing over more than a year, with media reports citing Mint saying he has invested about $25 million.