A re-contactable research volunteer register and sample biobank of local people with and without health problems who are willing to provide blood and urine samples, have their blood pressure taken and answer simple health and lifestyle questions. Half of the sample taken is used to measure diagnostic markers including blood sugar and cholesterol, which can be shared with the volunteer and the remaining half (requiring consent from the participant) is saved in a biobank. Participants without diabetes will be offered the opportunity to receive a copy of their health measures and blood tests. They may also choose to have these results copied to their doctor. Participants are invited to a return visit (after around three years) to replace samples that have been used up, and update the measurements and other health data recorded The Peninsula Research Bank (PRB) holds the data and banked samples of DNA, urine, serum, plasma and prospectively collected RNA/ whole blood for long term management. The Extend/PRB Biobank enables research into why some people are predisposed to develop a disease as they get older and why some people are protected. The EXTEND register volunteers who are identifiable by phenotype and genotype and agree that they can be contacted to participate in various research projects based on their genetic predisposition have the choice of whether they wish to be involved in studies about Dementia/Alzheimer's disease. Participants can give permission for Researchers to access their medical records.