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Twin research

Twins can contribute with useful knowledge when you wish to study the reason why some hereditary dispositions are expressed and some are not. 

Research at the DTR

A number of illnesses and complex qualities have been and are continuously being explored at the DTR, e.g. illnesses such as cancer, diabetes, metabolic disorders, arthritis, anorexia, migraine, epilepsy, and eczema. Another significant part of the research deals with mortality and causes of death, as well as elderly twins’ physical abilities in daily life. Some of the complex characteristics being investigated are the causes of variation in individuals’ blood pressure, sugar metabolism, fitness, weight, and distribution of fat. Read more about current twin projects…

Health and illness

The identification of a genetic or environmental component for health related problems can improve early prevention and treatment which will entail a considerable improvement in public health.

Aging studies

One of the most significant research areas of the Danish Twin Registry have been the study of health and physical abilities among middle-aged and elderly twins. The purpose of studying these particular age groups has been to understand and study differences in health, aging, and life expectancy. Because of the long follow-up time of the oldest twins, the DTR has for the last 15 years been of great importance for aging research. The studies have especially been centred on the question: Why do we age so differently?


Epigenetics - stable changes of gene activities without the DNA sequence being changed –  is a new and intriguing research area, which is particularly informative in combination with twin data.

About twin research

Scientific analyses of twin data contribute to identify genetic and environmental causes of the occurrence and development of diseases, including the overall significance of the genetic and environmental components on the development and aging of humans.

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