Here are half a dozen studies on weight, bite size, vitamin D, dietary supplements, and ways of avoiding dementia.  Andrew et al report on the "Incident cancer burden attributable to excess body mass index in 30 European countries" estimating that about 6% of cancers could be avoided if we could maintain healthier weights (abstracts & links for all six articles mentioned appear further down this page).  Zijlstra and colleagues suggest a possible response!  They randomized subjects to eating with different bite (mouthful) sizes and different chewing times.  They found that " ... greater oral sensory exposure to a product, by eating with small bite sizes rather than with large bite sizes and increasing OPT (oral processing time), significantly decreases food intake."  As Mum might put it "Don't wolf your food!"

Here are five studies on the loose theme of how the mind affects the body, and the body affects the mind ... and that the distinction between mind and body is pretty arbitrary anyway.  Using meta-analysis, Chida & colleagues highlight considerable evidence suggesting that stress-related psychosocial factors have an adverse effect on cancer incidence and survival.  Andersen & colleagues report a randomized controlled trial to respond to this in women diagnosed with breast cancer.  Women in the stress management arm of the study received an initial one-year, 26 session intervention in groups of 8 to 12 people.  The aim was to reduce distress and improve quality of life, improve health behaviors (diet, exercise, smoking cessation), and facilitate cancer treatment compliance and medical follow-up.