After an inspection of a ZYTO Technologies facility in Lindon, Utah in December 2022, the US Food and Drug Administration issued a warning letter to the company on 21 June for promoting its Hand Cradle Galvanic Skin Response (GSR) device — and its associated proprietary software — for uses for which it did not have FDA clearance.
The device, the FDA emphasizes, was cleared solely to measure galvanic skin responses, which are changes in the sweat glands...