What are normal testosterone levels by age? An older photographer mentors a younger one. Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical ...

Creatinine levels are measured to gauge how well a person's kidneys are functioning. Normal creatinine levels are between 0.7 to 1.3 mg/dL for men, and 0.6 to 1.1 mg/dL for women. To lower your ...

For adults, a typical level of vitamin D in the blood is 20 nanograms per milliliter (ng/ml) or above. Levels of 12 ng/ml are too low and levels of 50 ng/ml are too high. High or low levels may affect ...

If you have diabetes, daily management of your blood sugar levels is important to feeling your best and preventing long-term health complications. Blood sugar can also be an important measurement to ...

Many men are familiar with the routine: During your annual exam, your doctor slips on a glove and feels your prostate. The goal is to check this walnut-sized organ for lumps, hard spots, and other ...

Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical role in helping control fat levels, cholesterol, and glucose levels. Testosterone ...