“..Cancer rates are soaring – but why?
Harvard professor Daniel Lieberman says it is the result of human evolution clashing with modern life –
- and explains how to cut the risk..”
“..Here however – our focus is on cancers caused by obesity – and long-term positive energy balance –
- where calories taken in through food and drink are greater than calories used by the body.
These “cancers of affluence” are most common in reproductive organs –
- especially breasts – the uterus – and ovaries – in women -
- and the prostate gland in men –
- but cancers of other organs such as the colon are sometimes also affected by a chronic surfeit of energy.
How and why energy balance contributes to reproductive cancers has been difficult to fathom -
- because the causal relationship is indirect and complex.
The first clues to an energy-related pathway for cancer appeared in the form of puzzling correlations between babies and breast cancer.
Early physicians such as Rigoni-Stern noticed and wondered why nuns were far more likely to get breast cancer than married women.
(For years breast cancer was known as the “nuns’ disease”.)
These observations were later bolstered by large-scale studies that showed that a woman’s chances of developing breast – ovarian – or uterine cancer -
- increase significantly with the number of menstrual cycles she experiences -
- and decrease with the number of children she bears. .”
“..The other key pathway that links chronic positive energy balances with reproductive cancers among women is through fat.
Human females are especially well adapted to store extra energy in fat cells -
- which collectively act as a sort of endocrine organ -
- to synthesise oestrogen that is released into the bloodstream.
Obese women can have 40% higher oestrogen levels than non-overweight women.
As a result – rates of reproductive tissue cancers among women are strongly correlated with obesity after menopause..”
go to source/story>>>