A new study has found that obesity diagnoses in England are increasing fastest among younger adults, raising concerns about the long-term impact on public health.
Researchers found that new obesity cases among people in their 20s and 30s have risen significantly over the past five years. Health experts warn that developing obesity at a younger age can increase the risk of serious conditions such as Type 2 diabetes, heart disease, and certain cancers later in life.
Young Adults See the Sharpest Rise in Obesity Diagnoses
The study, published in The Lancet, showed that obesity diagnoses among adults aged 30 to 39 increased by nearly 20% between 2019-20 and 2024-25.
Obesity Cases Increase Among Adults in Their 20s and 30s
Among adults aged 20 to 29, new obesity cases rose by 16% during the same period.
Although obesity is most commonly diagnosed among people in their 40s and 50s, researchers were surprised by the rapid increase in diagnoses among younger age groups.
Health Inequalities Linked to Rising Obesity Rates
The study also revealed significant differences across communities.
Higher Obesity Rates Seen in Deprived Areas and Ethnic Minority Communities
Earlier obesity diagnoses were more common among people from ethnic minority backgrounds. Areas with higher levels of deprivation also experienced larger increases in obesity rates compared with more affluent regions. read more
Researchers said these patterns are well known, but the speed of the increase among younger adults is particularly concerning.
Why Are Obesity Rates Increasing Among Younger Adults?
Lead researcher Robert Fletcher suggested several factors may be contributing to the trend.
Unhealthy Food Environments May Shape Long-Term Habits
Many adults in their 20s and 30s grew up surrounded by fast-food outlets and extensive marketing of unhealthy foods.
According to Fletcher, exposure to these environments during key developmental years may have influenced long-term eating habits and lifestyle choices.
Pandemic and Cost-of-Living Pressures Affect Health Choices
The Covid-19 pandemic and the cost-of-living crisis may have affected younger adults more significantly.
Many people faced increased stress while balancing work, childcare responsibilities, and financial pressures. Rising food prices also made healthier food choices less affordable for many households.
Food Advertising and Accessibility May Contribute to Obesity Trends
Public health experts say unhealthy foods have become easier to access than healthier alternatives.
Young People Face Constant Exposure to Food Marketing
Sarah Perman said children and young people are regularly exposed to advertising for foods high in fat, sugar, and salt.
Healthier foods often cost more, making nutritious diets harder to maintain for many families.
Digital Platforms Could Be Influencing Obesity Rates
Experts believe technology may also be affecting obesity trends among younger generations.
Food Delivery Apps and Social Media May Affect Eating Behaviours
Katharine Jenner said online food delivery services and social media platforms may contribute to rising obesity rates.
She noted that younger adults spend more time online, where they are frequently exposed to food promotions and advertising.
The pandemic may also have disrupted physical activity routines and healthy habits during important stages of adulthood.
Researchers Analysed 55 Million NHS Records
Researchers from University of Cambridge, British Heart Foundation, and George Institute for Global Health analysed data from 55 million adult NHS patient records.
Study Reveals Significant Growth in New Obesity Diagnoses
The study excluded people who had already received an obesity diagnosis and focused on identifying new cases.
Among adults aged 30 to 39, new obesity diagnoses increased from 20.3 per 1,000 people in 2019-20 to 24.1 per 1,000 in 2024-25.
For those aged 20 to 29, rates rose from 17.5 to 20.3 new cases per 1,000 people.
These represented the largest increases across all age groups.
Older Adults Show Different Obesity Trends
Researchers found that new obesity diagnoses declined among people aged 60 to 79.
Weight-Loss Medications May Be Influencing Outcomes
One possible explanation is that older adults may have greater access to weight-loss medications, particularly through private healthcare options.
Rates of People Living With Obesity Continue to Rise Across England
The study found that the proportion of adults living with obesity increased from 26.2% to 30.3% over the five-year period.
Experts Warn of Long-Term Public Health Challenges
Michael Marmot from University College London described the findings as concerning and said they provide further evidence that health inequalities have widened in recent years. know more
Government Introduces Measures to Address Rising Obesity Rates
The government says it is taking action to address rising obesity rates.
New Restrictions on Junk Food Advertising Planned
A spokesperson for the Department of Health and Social Care said current plans include stricter restrictions on junk food advertising and new targets to encourage healthier food sales.
Health experts say continued action will be necessary to improve access to healthy foods and reduce obesity rates among younger generations.
Rising Obesity Diagnoses Highlight Need for Early Intervention
The study highlights growing concerns about obesity diagnoses among younger adults in England. Researchers and health experts say addressing food environments, affordability, health inequalities, and lifestyle factors will be critical to improving long-term health outcomes and preventing obesity-related illnesses in the future.
