Washington [US], December 31 (ANI): Women's ability to utilise fat as a fuel source is thought to be impaired by the oestrogen deficit that occurs after menopause. The rate at which middle-aged women are able to use fat at rest or during activity is not clearly determined by menopausal state or blood oestrogen levels, according to a study done at the Faculty of Sport and Health Sciences of the University of Jyvaskyla. Bet