We are used to thinking of body fat as a single entity. But biology says otherwise: there are at least two different types of fat that function completely differently. One clings to the skin (subcutaneous) – the fat you see and feel. The other, more severe one, sits deep in the abdomen, around the internal organs: the liver, pancreas, intestines. This is visceral fat.
A new study that made headlines in the scientific media worldwide shows that it is precisely this fat – the hidden, internal one – that is the main factor accelerating our brain aging. And most interestingly: a modest reduction of it over two years measurably slowed brain aging.
Why Specifically Visceral Fat?
Visceral fat differs from subcutaneous fat in several key ways:
- High metabolic activity – it secretes large amounts of biologically active substances.
- Proximity to the liver – via the portal vein, substances from this fat reach the liver directly.
- Source of systemic inflammation – it secretes TNF-α, IL-6, CRP – those inflammatory markers that cause inflammaging.
- Effect on hormones – it secretes leptin, resistin, and is responsible for insulin resistance.
This means: every gram of visceral fat is essentially a small "factory" producing inflammatory substances that flow in the bloodstream, cross the blood-brain barrier, and damage neurons.
The Study: 24 Months, 200 Participants, Advanced MRI
The team from Ben-Gurion University led by Dr. Iris Shai conducted a long-term study. It required a combination of:
- 200 participants aged 30-65 with excess abdominal fat.
- Division into different intervention groups: Mediterranean diet, low-carb diet, or just calorie restriction combined with physical activity.
- 24-month follow-up.
- Precise measurements: MRI measuring visceral fat volume separately from subcutaneous, and brain MRI measuring the volume of different brain regions.
The Core Finding
Participants who reduced their visceral fat by 5% or more over two years showed:
- Higher brain volume in the hippocampus – the memory region.
- Better preservation of gray matter volume – the matter containing neurons.
- Biological brain age 3-5 years younger than others of the same chronological age who did not reduce visceral fat.
- Improvement in cognitive performance on memory and attention tests.
Most impressive: the effect of fat reduction on the brain was stronger than the direct effect of total weight. People who lost weight but did not specifically reduce visceral fat did not get the same brain benefit.
How to Measure Visceral Fat?
Three methods, from simple to complex:
- Waist-to-Hip Ratio: Measurement of waist circumference divided by hip circumference. Men above 0.9 and women above 0.85 = increased risk.
- Waist Circumference: Men above 102 cm, women above 88 cm = risk.
- DEXA or MRI: Precise measurement of visceral fat volume. Available through an advanced family doctor or weight specialist.
The Practical Solution
The team identified a combination of 4 factors that worked best for reducing visceral fat:
1. Enriched Mediterranean Diet
Olive oil, vegetables, legumes, fatty fish, nuts. The secret weapon: greens – spinach, beets, beans – they were the group that showed the strongest effect against visceral fat.
2. Moderate-Intensity Aerobic Training
Brisk walking, cycling, swimming – 150 minutes per week. Visceral fat responds well to consistent aerobic activity, but not necessarily to high intensity.
3. Resistance Training Twice a Week
Not just for building muscle – muscle is a metabolic organ. It requires energy and improves insulin sensitivity, which reduces visceral fat accumulation.
4. Quality Sleep
Less than 6 hours of sleep per night increases visceral fat accumulation through effects on cortisol and insulin. 7-8 quality hours are essential.
What Doesn't Work
It's also important to warn about what won't work:
- Abdominal exercises – do not help reduce visceral fat. "Spot reduction" is a myth.
- Extreme diets – cause muscle loss and rapid regain.
- "Fat-burning" supplements – no solid evidence for most.
- Prolonged fasting – can work for some, but not found more effective than a controlled Mediterranean diet.
The Simple Summary
If the fat on your belly looks soft and pinchable, it's subcutaneous. If it's hard and protrudes forward, it's visceral. The hard belly is a problem – not just for diabetes regulation, but directly for your brain. A modest reduction of 5-10% over two years, through a Mediterranean diet + balanced physical activity, can slow your brain age by 3-5 years.
This is perhaps the intervention with the best effort-to-benefit ratio in all of anti-aging: no drugs required, not expensive, not extreme, and with results measurable in the brain via scans.
References:
ScienceAlert - Visceral Fat and Brain Aging
Ben-Gurion University Health Sciences
💬 תגובות (0)
היו הראשונים להגיב על המאמר.