Kaitlin Sullivan is a health and science journalist based in Colorado. She's been part of multiple award-winning investigations into health topics including the international medical device industry ...

Blood sugar tests measure the amount of glucose in your blood and help detect prediabetes, diabetes, and blood sugar ...

Your CO2 blood test is more than just a number—it reflects how well your body is balancing acid and base, and how your lungs and kidneys are working together. Abnormal levels can point to breathing ...