Vascular Complications in Children From T1D Diagnosis

This study is following children who have just been diagnosed with Type 1 diabetes to track whether their blood vessels show early signs of damage. Vascular complications (problems with blood vessels) can develop over time in people with diabetes, and researchers want to understand how early these changes begin — even shortly after diagnosis. **You may be eligible if...** - You are between 8 and 18 years old - You were diagnosed with Type 1 diabetes within the last 14 weeks - You are willing to undergo non-invasive blood vessel tests and wear a blood pressure monitor for 24 hours **You may NOT be eligible if...** - You have other metabolic or hormonal conditions (like Type 2 diabetes or a cholesterol disorder) - You have certain genetic conditions (like Down Syndrome or Prader-Willi syndrome) - You have an eating disorder diagnosis - You are a transgender child taking hormone blockers or sex steroids - You are currently on medications that affect metabolism (like steroids or antipsychotics) Talk to your doctor to see if this trial is right for you.