Testosterone levels peak for males during puberty and decline with age in all genders. With low testosterone in males, you can have a decreased sex drive, trouble with erections, and low sperm count.

Jason Fernando is a professional investor and writer who enjoys tackling and communicating complex business and financial problems. Eric's career includes extensive work in both public and corporate ...

This group of tests measures the amount of cholesterol and other fats in your blood. Cholesterol and triglycerides are lipids, or fats. These fats are important for cell health, but they can be ...