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 ...

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 ...

Dear Dr. Roach: All my friends who are hypertensive have been able to bring their blood pressure to 120/80 or less. However, I have diabetic friends who are taking several diabetic drugs but none has ...

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 ...