Comment by manmal

They could market it as an exclusion test - "Congrats, you will not have Alzheimer's in the next 15 years" vs "Sorry, we can't say for sure that you don't have Alzheimer's. Why not upload your 23andme data here, and we combine your high risk alleles with our confidence of you having the disease, to produce a higher confidence result. Also, here is a list of lifestyle changes that reduce your risk of Alzheimer's (and also stroke, heart attack etc)".