
Hype vs. reality: doctors critique three buzzy medical breakthroughs
Three buzzy medical breakthroughs—Shield blood test for colorectal cancer, at-home Alzheimer’s biomarker tests, and GeneSight pharmacogenomic tests—are drawing attention, yet doctors warn they don’t live up to hype: Shield misses many early cancers and precancerous polyps, at-home Alzheimer’s tests can yield false positives and anxiety without proper clinical oversight, and GeneSight can’t replace clinical judgment or trial-and-error in finding the right medication.

