Add Yahoo as a preferred source to see more of our stories on Google. Experts agree that the microbiome is important to human health. But many are skeptical about how useful these kits are.'Photograph ...

Ahead of a sale, only 15% of 23andMe's user base has deleted accounts. Do people not care, or are they just unaware? For those in the latter camp, here's how to ditch your account. Regeneron ...