Rising carbon dioxide levels are being detected within the human body, with new research warning a key blood marker for the gas could near its healthy limit within decades if current trends continue.

There are no official numbers for the optimal levels of testosterone, but certain medical laboratories use the following reference values for typical total serum testosterone, measured in nanograms ...

You may have noticed a plethora of reels and posts on social media claiming cortisol “spikes” are harmful. Some warn against drinking coffee on an empty stomach or even doing certain exercises lest ...

Scientists have found an ideal frequency.

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 ...

Plasma p-tau217 levels predict the timing of Alzheimer’s onset in cognitively unimpaired adults in the research that could potentially guide research and preventive trials.

January was a month of records and extremes on both ends of the thermometer across Canada. This was the second month in a row the country saw a temperature drop below -50°C, and we witnessed some ...

A dangerously high blood pressure reading for women is 180/120 mmHg or higher. Learn more about the health risks and when to seek emergency care.

Kristi is a registered nurse with over 15 years of experience caring for both adult and pediatric patients at the beside. She worked as a Pediatric Intensive Care Unit RN for the first 4 years of her ...

A complement C4 (also known as a complement component 4, or simply C4) is a test to measure the level of C4 proteins you have in your blood. These proteins play a role in how your immune system ...

Potassium is a nutrient in food that helps your body run smoothly. Too much potassium in your body can cause health problems, but a simple blood test can measure your levels. Potassium plays a role in ...

Jay N. Yepuri, MD, MS, FACG, is a board-certified gastroenterologist and member of the Digestive Health Associates of Texas Board of Directors and Executive Committee. A liver function test checks how ...