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The Postmenopausal Fat Redistribution: How Declining Oestrogen Increases Heart Disease, Type 2 Diabetes & Long-Term Care Risk
There is a phenomenon well-documented in menopause research called the subcutaneous-to-visceral fat redistribution, sometimes informally referred to as “the storage switch.”
Before menopause, women’s bodies preferentially store fat subcutaneously — under the skin, mostly around the hips and thighs. This is largely an effect of oestrogen, which directs fat deposition to these areas. After oestrogen levels decline (which begins in late perimenopause and continues through postmenopause), the body’s storage preference shifts toward visceral adipose tissue (VAT) — fat stored deep within the abdominal cavity, around the liver, pancreas, and intestines.
This is why a substantial proportion of women in their late fifties report what they describe as “a sudden tummy” — even when their overall body weight has barely changed. The fat hasn’t necessarily increased in total. It has moved.
This pattern is striking in the published research. The Study of Women’s Health Across the Nation (SWAN), one of the largest longitudinal studies of women through the menopause transition, found that women’s total body weight changed relatively little across the menopausal transition — but their fat distribution shifted significantly toward the abdomen, with measurable increases in visceral fat even when overall weight remained stable (Greendale et al., JCI Insight, 2019). The scale was, in effect, lying to them. Their body composition was telling a different story.
This matters for one practical reason: the strategies that worked for waist management at 40 generally do not work at 60. The biology has changed. Pretending it hasn’t is the most common mistake reflected in the published behavioural research on this age group.
So if “eating less” is what most women try first, why does the research suggest it often makes things worse? That is what we found next — and it has to do with what happens in your body between 4 and 6 a.m., before you even open your eyes.
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