How height has changed over 100 years

The largest ever study of height around the world has found that Dutch men and Latvian women are the tallest on the planet.

Wellcome researchers tracked height among young adult men and women around the world over a 100-year period from 1914 to 2014.

Women in South Korea and men in Iran have seen the biggest increase in height over this period, growing by an average of 20.2cm and 16.5cm respectively.

Men and women in the UK are around 11cm taller than they were a century ago. Height in the USA has increased by 6cm for men and 5cm for women.

The team also found that:

How tall we grow is strongly influenced by nutrition and environmental factors, although genetics may also play a role. Children and adolescents who are better nourished and live in healthier environments tend to be taller.

Height may also be influenced by a mother’s health and nutrition during pregnancy. 

Mary De Silva, Head of Population, Environment and Health at Wellcome, said the most striking thing was the gap between the tallest and shortest countries. "More research is needed to understand the reasons for this gap and to help devise ways of reducing the disparities in health that still persist globally," she added.

Read more about the research in the Imperial College London press release.