A systematic review published in 2017 examined the cumulative effects of repeated use of tDCS, the technology in Halo Sport. The authors concluded that in the 158 studies reviewed involving over 4,130 participants, consecutive, repeated sessions of tDCS did not increase participants’ risk of experiencing significant negative effects of stimulation.
As with any new technology, since data are not yet available that speak perfectly to the cumulative safety of tDCS over a period of many years, we also refer to the underlying mechanisms. tDCS applies very low levels of constant electrical current to the brain, creating electric fields no stronger than those already generated by the neurons, and in general shifting the timing of neural activity rather than causing neurons to fire on their own.
Finally, Halo continually surveys our most frequent users and monitors customer feedback. In the hundreds of responses we received to our most recent survey, the most common sensation users reported was tingling. Only ~5% of users reported mild headache.
To learn more about the safety of Halo Sport, click here: Is Halo Sport Safe?