Please note in krispin the magnesium high absorption forms. Krispin's site also has a section on potassium that should be of interest. Search on "nothing boring about boron". It helps increase magnesium absorption and retention. I believe 3 mg a day as a maintenance dose. Contact a nutritionist for more appropriate levels for your husband. Also note it's effect on vitamin D and a vitamin D deficiency concerning chronic GVDH was reported in " Increased incidence of chronic GvHD and CMV disease in patients with vitamin D deficiency before allogeneic stem cell transplantation" Please take time to study flavoniods and liposomal delivery. In general, flavoniods have low absorption however creating liposomal flavoniod delivery increases absorption and overcomes possible system distress. My wife has myelofibrosis. She uses liposomal vitamin c primarilly to build collagen to prevent bruising and purpura.It allows it to remain at an almost IV level for four hours as opposed to non-liposomals much lower level for thirty minutes. Learn making liposomal supplements like vitamin C. I told a friend in London who has prostate cancer in addition to myelofibrosis about kaempferol and he added it to his vitamin C batch and later when his PSA was tested it had dropped from 15, where it had remained at, to 7!. It amazed his Doctor. I mentioned it to indicate it has a potential. I also encourage checking out "K2MK4 (Menatetrenone) and leukemia". It requires 45mg three times a day. It works well with quercetin. Fisetin along with quercetinand resveratrol has been reported to have a positive effect in senescent cells. Please research "Acute Myeloid Leukemia Produces Senescent Cells to Promote its Own Growth, and is Thus Vulnerable to Senolytics" Don't overlook probiotics and fermented foods for gut health. Bad bacteria produce usease encourage you to search on " Bacterial Urease and its Role in Long-Lasting Human Diseases" I have sent the above posting and the previous one as well to make you aware of areas that could help your husband. Always consult your health care professional before using any supplement.