Is ZMA safe to use when going through PFS?

I remember reading evidence for and against it, but this was some time ago. I haven’t kept up with findings lately…does anyone know whether ZMA is safe to use when going through PFS? I am currently on Dr. Scally’s HPTA Restart Protocol of Clomid and Tamoxifen, if that makes any difference. I’d like to add ZMA for sleep since mine has been so poor lately. Any advice, input, or first hand accounts of ZMA usage with PFS would be greatly appreciated! Thank you!