Temple can track your brain, Deepinder Goyal shares new research before launch in India

Deepinder Goyal has shared new research on Temple's BrainFlow technology, which uses non-invasive sensing to track changes linked to brain blood flow. The findings come ahead of the device's planned launch in India.

In Short

• Deepinder Goyal shares new Temple BrainFlow research
• Temple tracks changes linked to brain blood flow
• BrainFlow launch in India is approaching

Deepinder Goyal has shared new research on Temple, his wearable device designed to monitor blood flow-related changes around the brain, as the company moves closer to its wider launch in India. The latest study suggests that Temple BrainFlow showed a stronger correlation with changes in brain blood volume than with blood volume changes in the scalp.

The findings come from a second validation study involving Temple BrainFlow and time-domain near-infrared spectroscopy (TD-NIRS), a technique that can distinguish signals from deeper brain tissue and superficial scalp layers. According to the preprint shared by him, researchers analysed 60 sessions involving 44 healthy young adult men. Participants underwent three controlled physiological challenges - a 30-degree head-down tilt, moving from standing to a squat, and moving from standing to a supine position.

The researchers compared Temple's Brain Flow Index with blood-volume changes measured in the brain and scalp layers using TD-NIRS. Across the three tests, the median correlation between Temple BrainFlow and the model-derived brain signal was 0.912 for head-down tilt, 0.843 for stand-to-squat and 0.839 for stand-to-supine.

The corresponding correlations with scalp signals were lower at 0.494, 0.700 and 0.767, respectively. Goyal said the results show that “Temple tracks the brain, much more than the scalp.” He also pointed to the head-down tilt test, where the correlation with the brain signal was 0.91 compared with 0.49 for the scalp.

The study found that the brain-versus-scalp difference was statistically significant for the head-down tilt and stand-to-squat tests, but not for the stand-to-supine transition.

Goyal said cerebral blood flow could be useful for studying how the body responds to factors such as exercise, sleep, dehydration and prolonged sitting. He claims Temple is designed to monitor such changes continuously rather than capturing them only during a clinical test.

The research was guided by David Boas, director of Boston University's Neurophotonics Center and a scientific adviser to Temple. Goyal said this is the second modality against which Temple BrainFlow has been validated, following Transcranial Doppler.

However, the research is currently available as a preprint and has not undergone peer review. The paper also states that Temple Private Limited funded and conducted the study, while several authors are employees or have other research ties with the company. The researchers say further work using flow-sensitive references and more extensive systemic monitoring is needed to establish cerebral specificity.

Temple India launch date?

There is still no confirmed public date for Temple's wider launch in India. Goyal has previously said the limited launch edition would begin shipping before the end of 2026. He has now indicated that the company could have a date for pre-orders soon, saying it is waiting for certainty on a couple of open items.

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