New Study Questions Old Assumptions About a Heart Risk Factor in Type 1 Diabetes

People with Type 1 diabetes face a significantly higher lifetime risk of coronary artery disease compared to the general population. Understanding all the factors that contribute to this risk is crucial for prevention and early intervention.

Lipoprotein(a), often called Lp(a), is a cholesterol-like particle that circulates in the bloodstream. Unlike some other risk factors, Lp(a) is primarily determined by genetics—meaning you inherit your baseline levels from your parents. For decades, doctors have assumed Lp(a) stays relatively constant throughout a person's life, which is why they typically measure it just once.

Researchers in Geneva studied 286 young people with Type 1 diabetes over an 11-year period, collecting Lp(a) measurements annually. In total, they gathered 1,403 individual measurements, with some participants having as many as 13 measurements over the course of the study.

The findings challenge the traditional view of Lp(a) stability. Among participants who had multiple measurements taken, nearly one-third showed changes in their Lp(a) levels that exceeded 50%—a substantial fluctuation. At the beginning of the study, 26% of participants already had elevated Lp(a) levels (defined as 300 mg/L or higher), putting them at higher cardiovascular risk.

These findings suggest that a single lifetime Lp(a) measurement might not tell the complete story, at least in young people with Type 1 diabetes. Because Lp(a) levels appear to change over time in this population, doctors may need to rethink how they assess and classify cardiovascular risk.

This is particularly important because young people with Type 1 diabetes are already at elevated risk for heart disease. Having accurate and current information about all contributing risk factors—including Lp(a)—could help doctors identify who needs closer monitoring or earlier preventive interventions.

More research is needed to understand why Lp(a) fluctuates in some young people with Type 1 diabetes, whether these changes are related to diabetes management, and how doctors should use this information in clinical practice.

Source: Cardiovascular diabetology. Evidence type: PubMed indexed literature. Type1Cure is an information and intelligence hub, not a medical advice service. This article summarizes published research and does not provide diagnosis, treatment, or personal medical guidance. Always talk to your own care team before changing anything about your Type 1 diabetes management.