We don't know and understand all the factors that cause Alzheimer's yet, so while genetic testing can be helpful, it oftentimes won't be able to tell the whole story.

23andMe now provides FDA-approved reports on Parkinson's disease risk, and I thought readers could benefit from a post specific to the condition. This guest post was written by my friend and former colleague, Lola Cook Shukla, who specializes in the genetics of Parkinson's disease.

Meet Kim Brown Foil. Kim is a genetic counselor and an expert in Alpha-1 Antitrypsin Deficiency.

There is a growing issue of certain practitioners recommending genetic testing for MTHFR so that they can sell you supplements.