ScienceInsights

From low iron to recent tattoos, find out what actually disqualifies you from donating blood and whether it's permanent or just temporary.

Wondering if you need allergy testing? Learn the key signs, from persistent symptoms to severe reactions, that suggest it's time to see an allergist.

Outpatient rehab lets you get treatment while living at home. Learn about the three levels of care, who qualifies, what it costs, and how results compare to inpatient.

Minoxidil works best when started early, but timing matters. Learn when to begin treatment and when hair follicles may be too far gone to respond.

Many common medications can leave a metallic taste in your mouth. Learn which ones are most likely to blame and what you can do to ease the side effect.

Hypopyon is a buildup of white blood cells in the eye that can signal infection or inflammation. Learn what causes it, how it's treated, and what to expect.

Narrowed eyes can signal suspicion, attraction, focus, or joy. Learn what this subtle expression really means and how context changes everything.

Cottage cheese is made from milk, cream, and salt — but the process of turning milk into curds is more interesting than you'd expect.

Learn what blood sugar numbers to aim for with type 2 diabetes, from fasting levels to A1C goals, and how targets shift based on your age and health.

Stage 3 ovarian cancer has spread beyond the ovaries, but treatment options including surgery and chemotherapy can still be effective.