Is DEXE hair fiber safe?

Could you elaborate on the safety profile of DEXE hair fiber? As a consumer considering this product, I'm particularly interested in understanding its potential risks, side effects, or allergic reactions it might trigger. What kind of research or testing has been done to ensure its safety? Are there any known contraindications for using DEXE hair fiber? I'd also appreciate any insights into its long-term usage implications, especially if it involves prolonged exposure or frequent applications. I want to ensure I'm making an informed decision before incorporating this product into my hair care routine.