Type 1 diabetes involves insufficient insulin production and requires insulin treatment. Lifestyle advice is not a substitute for this treatment. Diagnosis and an individual treatment plan require qualified healthcare professionals. Insulin helps glucose move from blood into cells for energy. When the body does not make enough insulin, prescribed replacement is essential. Ask the treating team how to monitor glucose, recognise problems and obtain supplies. A meal or activity plan should support prescribed care. This guide cannot decide an insulin amount or certify that an individual result is safe.