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Modern medicine's expanding arsenal of laboratory tests was supposed to make diagnosis more precise. Instead, a growing body of evidence suggests that excessive testing is generating confusion, false alarms, and unnecessary treatment—while driving up costs for patients and the healthcare system alike. Understanding which tests genuinely serve your health may be the most important diagnostic skill you develop.
Americans spend upward of $50 billion annually on dietary supplements, yet a significant portion of those products rest on shaky or nonexistent scientific evidence. Misleading marketing claims are driving consumers away from proven treatments and toward products that may offer little more than an expensive placebo. Understanding how the supplement industry operates — and which products genuinely deliver — is one of the most consequential health literacy decisions a person can make.
For millions of Americans, taking five or more prescription medications daily has become routine—yet research increasingly shows that more drugs do not automatically translate into better health. Polypharmacy carries hidden dangers, from compounding drug interactions to symptoms that masquerade as new illnesses. Understanding how to navigate this complexity with your physician may be one of the most important steps you can take for your long-term well-being.
Some of the most confidently repeated health advice circulating in American households has little to no scientific support. From hydration rules to knuckle-cracking folklore, these persistent myths shape daily behavior in ways that range from mildly unnecessary to genuinely counterproductive. Here, we examine five of the most stubborn misconceptions—and what the current evidence actually tells us.