How Do You Know If You Have Low Testosterone?

Low testosterone symptoms include fatigue, decreased libido, erectile dysfunction, and reduced muscle mass. Blood tests measuring total testosterone levels below 300 ng/dL typically indicate low testosterone, though symptoms matter more than numbers alone. Common signs include difficulty building muscle, increased body fat, mood changes, and poor sleep quality. Men over 40 experience a natural 1-2% annual decline in testosterone production. Additional symptoms may include brain fog, irritability, and decreased motivation. If you're experiencing multiple symptoms, consult a healthcare provider for proper testing and evaluation of your hormone levels.