Metabolic, Vitamins & Minerals Guides

Metabolic, vitamin, and mineral tests look at how your body uses energy and nutrients. Common panels measure blood sugar and insulin, cholesterol and triglycerides, plus vitamins such as B12 and D, and minerals like iron, ferritin, and calcium.

These markers are often ordered together because they interact. Blood sugar, lipids, and vitamin status can influence how you feel and how other results are interpreted, so a panel frequently gives a clearer picture than a single test on its own.

Preparation matters. Fasting is required for some glucose and lipid tests, and certain supplements can skew vitamin results, so check the notes on each test page and follow the instructions given for your appointment.

Results are reported against a laboratory's reference range, which can differ from one lab to another. Trends over time are often more meaningful than a single reading, which is why many people repeat the same panel at intervals.

If you are managing a condition such as diabetes or high cholesterol, your provider may recommend a specific testing schedule, and these pages can help you understand what each test is checking.

Use these guides to learn what each marker reflects and how results are typically reported. This content is educational and is not a diagnosis; review your results and any changes with a qualified healthcare provider.