Weight Issues

Unexplained weight gain or difficulty losing weight can have underlying physical causes. Thyroid function, blood glucose (HbA1c), and cortisol are all linked to weight changes, and are simple to check with finger-prick blood tests.

Order your tests online, take a small sample at home, and post it to our UK lab using the prepaid envelope provided. Results are typically ready within days, with clear reference ranges to discuss with your GP.

Weight is influenced by many factors, including diet, activity, sleep, and medication. These tests are designed to help identify physical contributors alongside your lifestyle, not to diagnose or treat weight issues on their own.

Browse our weight-related blood tests below, or explore individual tests for Thyroid Function, HbA1c, and Cortisol.