High red cell count also linked to dementia

There is a 22% increased risk of Alzheimer's for people in the haemoglobin category
Lydia Hales
Blood test

Anaemia has been linked with dementia previously but a new study shows that high, as well as low, levels of haemoglobin appear to increase risk.

The large, population-based Dutch study is one of the few to investigate dementia risk across the spectrum of haemoglobin levels, revealing a U-shaped pattern.