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New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

Test article - Obesity may damage immune cells that prevent psoriasis

10 September 2025

Mice with obesity have fewer immune cells in their skin that protect against psoriasis-related inflammation, potentially explaining why obesity increases the risk of the condition


Obesity may damage immune cells that prevent psoriasis

20 July 2023

Mice with obesity have fewer immune cells in their skin that protect against psoriasis-related inflammation, potentially explaining why obesity increases the risk of the condition


Having an 'overweight' BMI may not lead to an earlier death

5 July 2023

A large US study has found that being overweight but not obese carried a slightly lower risk of dying within the study period than being a supposedly healthy weight


Everything you need to know about the drugs Ozempic and Wegovy

7 June 2023

The medicines, which contain the drug semaglutide, can help people who are obese or overweight to quickly lose weight


A pair of the parasitic water-borne worms Schistosoma mansoni

We now know how parasitic worms help ward off obesity and diabetes

12 May 2023

We have long known that parasitic worm infections are associated with lower rates of several conditions. Now, research in mice reveals how the worms elicit these protections


Losing weight is good for your health – even if you regain it

28 March 2023

People who have obesity and lose weight through behavioural weight loss programmes have lower risks for heart disease and type 2 diabetes years later, despite regaining some weight


Previous studies have produced different results on the weight-loss benefits of fasting

Only eating between 7am and 3pm helps people with obesity lose weight

30 January 2023

Intermittent fasting led to a group of people with obesity losing 7.6 kilograms in 14 weeks when combined with them receiving advice on reducing their calorie intake, compared with 3.9 kilograms among those who only received the advice


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US childhood obesity guidelines may rush the use of drugs or surgery

27 January 2023

The American Academy of Pediatrics recommends intensive interventions to manage weight loss, including drugs and surgery – but it’s unclear whether they will reduce childhood obesity


A captive monkey scooping up water with a leaf

High-ranking monkeys are more prone to gain weight in captivity

10 October 2022

Captive macaques with a higher social rank tend to get more overweight, even though they don’t appear to consume more calories


Smoking and our body mass index may cause more than 200 medical conditions

Smoking and body mass are together linked to 226 medical conditions

7 October 2022

Smoking and our body mass index - whether underweight, overweight or obese -  may be involved in the onset of everything from heart failure and hernias to sleep apnoea and nail disorders


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