Why do genetic studies need to include people from diverse populations?

Including diverse populations in genetic studies is essential for ensuring that the benefits of human genetics research are equitable and applicable to all people. Because specific DNA variations are often more common in certain populations than in others, studies that lack diversity may fail to identify genetic factors relevant to health and disease across different groups.1

The primary reasons for prioritizing diversity include:

• Accuracy in Predictive Medicine: Genetic studies, such as genome-wide association studies, aim to identify links between genetic variants and disease risks. If these studies rely on limited population samples, the resulting data may not accurately predict health risks or therapeutic responses for individuals from underrepresented backgrounds.2
• Understanding Biological Complexity: Genetic variation is pervasive in natural populations, and every individual represents a unique genetic configuration. Including diverse groups allows researchers to better understand the full spectrum of human genetic diversity and the biological pathways that contribute to complex traits and diseases.32
• Ethical Responsibility: Harnessing genetic technology to improve health for all people requires a commitment to diversity. It is an ethical imperative to ensure that advancements in personalized medicine do not exclude or disadvantage specific populations.4