Lifehacker: …What happens when you delete your 23andme data? – Deleting your 23andme data doesn’t necessarily withdraw it from studies, especially since the data was “de-identified,” that is, stripped from your name and personal information. It does mean that your data will not be used in future research projects. 23andme explains their deletion policies here and here. It says: If you participated in 23andMe Research, your Personal Information will no longer be used in any future research projects. If you asked us to store your genetic samples, they will be discarded. We will retain limited information about you, including records of this deletion request, and other information as required by law and otherwise described in our Privacy Statement.