Night shifts 'linked to increased breast cancer risk'

Conclusion This study in mice appears to support previous research suggesting a link between night-shift work and breast cancer. It looked at an inverted pattern of light and dark to assess whether this is linked to greater risk. The researchers found mice exposed to weekly light-dark inversions saw a larger increase in body weight and quicker tumour development. One limitation with this study is it is an animal study, which reduces the generalisability of findings. However, as there are a number of studies that have drawn similar conclusions – some in humans – these findings do add to the research in this area. Shift working can disturb what is known as the circadian rhythm – the internal body clock. This can disrupt the normal workings of a hormone called melatonin and lead to poor sleep and chronic fatigue. Rotating shift work and a persistent lack of quality sleep can also disrupt the production of insulin, which may increase the risk of someone developing type 2 diabetes. It has also been linked to a range of chronic conditions, such as obesity, depression, diabetes and heart disease. The Health and Safety Executive has some useful and practical advice for people who work night shifts: take extra care if you drive to and from work as your concentration may be impaired – if possible, it may be a better idea to use public transport identify a suitable sleep schedule of at least seven hours a day – you may find it useful to keep a diary to assess what...
Source: NHS News Feed - Category: Consumer Health News Tags: Lifestyle/exercise Cancer Source Type: news