Your doctor says everything looks fine, but you still feel terrible. The problem might not be your health but how labs define “normal.” Understanding the difference between normal and optimal could ...

By Dr. Liji Thomas, MD A major UK study shows that commonly used home pulse oximeters can overestimate oxygen levels in people with darker skin, increasing the risk of undetected hypoxemia and raising ...

This is read by an automated voice. Please report any issues or inconsistencies here. You don’t feel like yourself. Maybe you’re low on energy, you’re not sleeping well, or your mood feels harder to ...

When it comes to understanding your fitness and overall health, VO2 max is often heralded as the most important metric. So if ...

Thyroid-stimulating hormone (TSH) helps control how much thyroid hormone your thyroid makes. High TSH usually means hypothyroidism, while low TSH points to hyperthyroidism. A typical adult TSH target ...

Understanding your creatinine levels is important for monitoring kidney function. When you go for your yearly check-up, you'll likely have a routine blood test for creatinine. In some ...

Lindsay Curtis is a health & medical writer in South Florida. She worked as a communications professional for health nonprofits and the University of Toronto’s Faculty of Medicine and Faculty of ...

Federal income tax rates range from 10% to 37%. Find out how they work and which brackets you're in. Many, or all, of the products featured on this page are from our advertising partners who ...

Prediabetes means your blood sugar is higher than typical but not high enough for a type 2 diabetes diagnosis. You may also experience insulin resistance and sometimes dark skin patches with ...

Amelia Ti is a Registered Dietitian (RD) and Certified Diabetes Care and Education Specialist (CDCES) based in NYC. She completed her Bachelor's in Nutrition & Dietetics at NYU and Master's in Applied ...