On Wednesday, the US Food and Drug Administration approved the first consumer DNA test that promises to tell buyers which drugs might work best for them according to their genetic profile. The manufacturer, 23andMe, won FDA approval by being very careful not to overpromise what its test can do— so careful that the approval highlights the limited usefulness of the test and how much we still don’t know about this field of medicine.
The test is related to a segment of medicine called pharmacogenetics, which is the study of how genes influence how we react to drugs. Variations in our genes can affect how quickly we break down a drug, how much we absorb, or how efficiently it gets to where it needs to be in the body.
The 23andMe test will...
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