For cancer, please read studies about Zinc. I am a survivor and it works for me, along with 1 tsp of dried ginger, needs to be dried, a day, Alma extract or powder, iodide (see Lugols). With cancer treatment such as chemo, chemo does not kill the cancer stem cells. After treatment it is essential to kill the stem cells, help your immune system deal with the evading cancer cells that hide from detection. There is so much info out there, peer reviewed studies. Personally this is what works for me. It took 3 years to build my body back up after the treatments and surgery. Cancer is also very fragile to fasting. Please see the film The Science of Fasting with Dr. Valter Longo’s study about how fasting through cancer treatment is effective by protecting your vital organs while wiping out the cancer cells being fragile due to the fasting. When in comes to dementia study just out about how junk food basically causing inflammation creates the conditions for a person to suffer from dementia. Food turns genes off and on instantly. If you feel like crap, it’s what you are eating number one.