It's important to be proactive when it comes to your health, and according to Michele Reed, DO, a board-certified family medicine physician and owner and director of MS Family Medicine Health Care, P.C. in New York, that starts with making an appointment with a general practitioner. GPs serve as a home base, referring you to specialists when needed. "When a patient sees their general practitioner, age-appropriate labs are ordered, such as screenings for anemia, cholesterol levels, and tests for kidney and liver functions, to name just a few," Dr. Reed said. While blood work is done as part of a general exam, be sure to alert your doctor to any symptoms (like anxiety or fatigue), so they can order the right tests.