Healthier diets could slow climate change via lower medical costs: Study

Photo: iStock

Research accounting for greenhouse gas emissions caused by the health care system shows healthier diets could have an even greater effect on climate change than previously thought.

Whilst a plethora of studies into the effects of the food system have shown how our eating habits effect the environment and climate change, none have taken into account the added greenhouse gas (GHG) emissions caused by medical care.

Researchers at the University of California and Oxford University conducted the first ever such study, combining both the potential decrease in (GHG) emissions from altered food production and from the decreased medical care required for dietary related diseases.

Model diets

Using existing data on the risk of contracting either colorectal cancer (CRC), type 2 diabetes (T2D) or coronary heart disease (CHD), foods most associated with the diseases were identified.

David Cleveland, chief researcher on the project, told FoodNavigator:

“To create healthier model diets, we altered the standard 2,000-calorie-a-day U.S. diet, changing the sources of about half of those calories. Fruit and vegetable intake was doubled, refined grains were partially replaced with whole grains, and red and processed meats reduced, with peas and beans increased to replace the meat protein removed. The second diet reduced red and processed meats further, and the third diet eliminated them completely. Added sugar, which is a known health risk, was not reduced, nor were dairy, eggs, fish or non-red meat.”

The reduced risk of contracting any of the three diseases, if either of the first two diets were adopted, would fall by 20% said Cleveland.  

The third diet, in which no red meats were included, a 40% reduction was estimated.

Healthcare costs in the US would also drop by around $77bn (€72bn) and $93bn (€97bn) for the third diet annually, almost halving the yearly $230bn (€216bn) spent treating all three diseases.

GHG emissions

The effects of such massive reductions in healthcare costs would have an equally profound effect on GHG emissions – something not factored into previous studies, Cleveland said.

The energy required to treat such diseases is immense, he explained, and potential reductions in GHG emissions would be around 222kg per person per year, almost a fifth of the total.

Moreover, since neither sugar nor dairy, eggs and non-red meat were included in the study, its estimations should be seen as ‘very conservative’ Cleveland added.

The British Government’s Scientific Advisory Committee on Nutrition found sugar to be one of the most major causes of non-communicable diseases such as those analysed in the study, and further research including this in a fourth diet model would likely contribute even further to GHG savings.

Source: Journal of Climactic Change 

Published 2017; doi: 10.1007/s10584-017-1912-5

"A healthier US diet could reduce greenhouse gas emissions from both the food and health care systems"

Authors: David A Cleveland, Elinor Hallström, Quentin Gee, Peter Scarborough

Related News

Tasty savings: the Forgotten Feast was created from unwanted food

Global food system ‘is not sustainable’

“In comparison with technological and dietary changes, reducing food waste plays a minor role for meeting the climate targets,” said Dr David Bryngelsson of Chalmers University of Technology, Sweden. ©iStock

Cattle consumption must be halved to hit EU climate targets

© iStock/maxmihai

Lack of UK policy on food security could be costly, warns charity


Brits prepared to shift to climate-friendly diets – within reason

©  iStock/f9photos

What now for climate change & food?

Tax cows to cut climate change. © iStock/Pelooyen

Tax beef 40% and milk 20% to cut carbon and save lives, say scientists

Submit a comment

Your comment has been saved

Post a comment

Please note that any information that you supply is protected by our Privacy and Cookie Policy. Access to all documents and request for further information are available to all users at no costs, In order to provide you with this free service, William Reed Business Media SAS does share your information with companies that have content on this site. When you access a document or request further information from this site, your information maybe shared with the owners of that document or information.