Yes. Mendi is completely safe to use.
It uses light-based technology called functional near-infrared spectroscopy (fNIRS) to measure changes in blood flow and oxygenation in the front part of your brain.
This method is non-invasive, gentle, and backed by decades of safe use in neuroscience and medicine.
How It Works Safely
Mendi’s sensors emit low-intensity red and near-infrared light that passes a few millimeters beneath the skin on your forehead.
Some of that light is absorbed by oxygenated blood in your prefrontal cortex (PFC); the region involved in focus, calm, and emotional regulation, and some of it reflects back to the sensors.
The device simply measures this reflected light to calculate changes in brain activity.
The light that enters the skin is non-ionizing, meaning it does not damage tissue or DNA.
It’s similar in strength to the infrared light used in hospital pulse oximeters and fitness trackers, and well within established international safety standards for human exposure.
fNIRS has been used safely in research for more than 30 years; even with infants, older adults, and clinical patients; with no known adverse effects.
What “Non-Invasive” Really Means
“Non-invasive” means that Mendi only measures your brain’s activity; no electricity or magnetic fields are applied, and there’s no physical penetration beyond light passing through the surface of your skin.
You might feel the light pressure of the headband, but the sensors produce no heat or discomfort.
Simple Safety Guidelines
To ensure the best experience:
Use Mendi on clean, dry skin.
Avoid using it on broken, irritated, or sunburned areas.
Store your device in a cool, dry place, away from direct sunlight or moisture.
If you ever experience mild skin sensitivity, simply take a short break.
Avoid looking directly at the light emitting sensors.
If you feel that the device is having a negative effect, stop its use and discuss your symptoms with your doctor.
In Short
Mendi uses safe red and near-infrared light to measure brain activity.
The light enters only surface tissue and does not cause harm.
fNIRS has a long history of safe use in both research and clinical settings.
Mendi doesn’t stimulate your brain it just listens.
It’s as safe as the light in a hospital pulse oximeter, designed to help you understand and train your mind.
About Electronics and Connectivity
The Mendi headset contains a small rechargeable battery and connects to your phone or tablet via low-energy Bluetooth; similar to wireless headphones or smartwatches.
Both the power output and Bluetooth signal are well below international safety limits for consumer electronics, and the headset emits no measurable heat or electromagnetic radiation beyond these standard functions.