Deep abdominal (visceral) fat isn't just 'extra fat': it's the fat depot most strongly correlated with insulin resistance, more than total weight — understanding this link helps prioritize where effort matters most.
The full read
The claim ('belly fat, over time, can lead to insulin resistance') gets the direction right but is less clear-cut on causal certainty. A 2024 review (Nutrients, MDPI) explains that visceral fat releases more free fatty acids into the portal vein, directly disrupting liver insulin sensitivity — and that it out-predicts type 2 diabetes better than waist circumference, waist-hip ratio, or even BMI in a cited Korean study. A mechanistic review (2014) details how visceral adipose tissue inflammation (cytokines, macrophages) contributes to systemic insulin resistance. But an older, more cautious paper (British Journal of Nutrition, 2007) notes no definitive proof of a direct causal link exists — visceral fat could be a marker of some other shared factor rather than the direct cause. The nuance matters: the link is real and well documented at the associational and mechanistic level, but 'can lead to' is a more honest phrasing than 'causes.' This isn't an immediate action item so much as a reference point for understanding where effort (reducing visceral fat through diet and exercise) makes the most metabolic sense.
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