What is Entropy? Deepinder Goyal Claims Temple Team Discovers New Biomarker: 'Can Measure Energy Use In Real Time'

Entrepreneur Deepinder Goyal announced that the team behind Temple has identified what it calls a new biomarker, “Entropy,” which is designed to measure the body’s metabolic activity in real time.

Sharing the update on X, Goyal said the biomarker can only be measured from the temporal region of the head and is meant to show how much energy the body is using at any given moment. The company has also opened up applications for early access to its platform.

How does the Entropy score work?

According to Goyal, Entropy appears on Temple’s home screen as a live score that refreshes every second.

The metric ranges from 1 to 250. Lower scores indicate deeper states of rest, while higher scores reflect greater physical exertion and energy expenditure.

The company claims that some of the lowest readings were seen in experienced meditators during deep meditation, while the highest scores were seen in elite athletes at maximum intensity.

What factors can affect entropy values?

Temple says Entropy offers a continuous view of the body’s metabolic state and responds to a wide range of daily activities and physiological factors.

The company says the score changes in response to sleep, stress, exercise, food, caffeine consumption, cold exposure, meditation and strength training.

According to Goyal, because these factors affect metabolism, they also affect entropy scores, allowing users to track changes in energy output as they occur.

Why does Temple believe entropy is better than heart rate?

Temple’s main claim is that entropy can provide a more accurate indication of metabolic activity than heart rate.

Goyal said the company compared Entropy readings and heart rate data with measurements from a metabolic cart, a laboratory tool used to assess energy expenditure.

According to the data he shared, Entropy achieved a correlation coefficient of r=0.93 over 100 cardio sessions, while Heart Rate recorded a correlation coefficient of r=0.55.

The company says these findings suggest Entropy tracks metabolic cost more closely than heart rate alone.

What is Entropy Maxima and Entropy Minima?

Temple also launched two related measurements: Entropy Maxima and Entropy Minima.

Goyal explained that Entropy Maxima represents the highest level of output an individual can achieve during physical activity. At the same time, entropy minima refer to the lowest metabolic state reached at rest.

The company recommends that users work to increase their peak performance while lowering their resting metabolic cost over time.

How was the biomarker tested?

Although Temple has shared details about the new biomarker, it has not yet revealed the technology used to generate the values or released detailed technical information explaining how the score is calculated.

The company is currently accepting early access requests through its website, but has not announced a launch date, pricing structure, supported devices, or scientific validation.