All the links you mention may have something in common.
There seems to be bacteria in the gut and diabetes link or inflammation and diabetes link. Gum disease is known to have effects trough letting bacteria and byproducts into the blood. Antiviral medication (HIV and herpes medication) may fight Alzheimer for the same reasons (they kill viruses and reduce inflammation indirectly).
Infections (bacterial, viral or prion) and/or inflammation they cause may be the common link.
It could be that anything that increases inflammation has link to Alzheimer's.
Exercise, sleep, stress reduction and good nutrition may be linked to infections or inflammation as well. Link may be trough improving immune system to fight infections and/or reducing inflammation.
There seems to be bacteria in the gut and diabetes link or inflammation and diabetes link. Gum disease is known to have effects trough letting bacteria and byproducts into the blood. Antiviral medication (HIV and herpes medication) may fight Alzheimer for the same reasons (they kill viruses and reduce inflammation indirectly).
Infections (bacterial, viral or prion) and/or inflammation they cause may be the common link.
It could be that anything that increases inflammation has link to Alzheimer's.
Exercise, sleep, stress reduction and good nutrition may be linked to infections or inflammation as well. Link may be trough improving immune system to fight infections and/or reducing inflammation.