Supporting sources include previously approved AnKing cards (AnkiHub IDs: 6203026c-5c7d-4aa3-b939-d531a90f8361, a2fe25fc-7946-4c8b-9c11-c74b0e827e94) as well as UpToDate (UpToDate)
As for concerns surrounding Kayexalate use, see the “Do not use sodium polystyrene sulfonate (SPS) or other resins” section of the above article (UpToDate)