Swiping a loyalty card at the pharmacy might seem like a harmless way to save a few bucks. But behind every “Buy One, Get One Free” offer is a data trail that says more about your household than you might realize. Retailers track every purchase down to the brand, dosage, and frequency, linking it all to your profile. That profile can reveal everything from chronic health conditions to family planning choices. And once it’s compiled, that data is often sold, shared, or analyzed in ways consumers never agreed to directly.
