Can your bathroom double as a lab? At-home testing is reshaping how we learn about our bodies — and raising new questions.

In this edition of The People’s Pharmacy, Joe and Teresa Graedon also hear from a reader who lost their sense of smell after using zinc to treat a cold.

Tuberculosis remains a leading global health challenge, but sputum testing—the current diagnostic standard—is difficult for many patients, especially children and people living with HIV. Researchers ...