Do you know if water-only fasting is a good way and/or necessary way to help stave off or even allow regression to occur? An anti-inflammatory diet, inflammati

Do you know if water-only fasting is a good way and/or necessary way to help stave off or even allow regression to occur? An anti-inflammatory diet, inflammation being known as one of the ~5 root causes of Alzheimer's for awhile now, like a ketogenic diet has been known to be beneficial - but water fasting will not only lower inflammation as much as possible, it will also arguably would cause more of the fat reserves to be used up - but whether that includes fat buildup in the brain too?