Part 1 of a 3-part series
by Erin Jowett, MS, RD
You can’t see it.
You can’t pinch it.
But it might be the most metabolically disruptive thing happening inside your body.
Visceral fat is not the fat you notice in the mirror. It’s the fat stored deep inside the abdomen, wrapped around vital organs like your liver, pancreas, and intestines. And while it may stay hidden for years, its effects are anything but subtle.
If your energy feels low, your cravings feel loud, your labs keep creeping in the wrong direction, or your metabolism feels resistant despite “doing everything right,” visceral fat is often part of the story.
image source: healthdirect.gov.au
Let’s break down what visceral fat is, why it matters, how it affects metabolism, how it’s measured, and most importantly — how to reduce it strategically.
What Is Visceral Fat (And Why It’s Different)?
Visceral fat, also called visceral adipose tissue (VAT), is fat stored inside the abdominal cavity, not under the skin (subcutaneous fat or SAT).
This matters because visceral fat is:
- Highly metabolically active
- Hormone-disruptive
- Inflammation-producing
Unlike subcutaneous fat, visceral fat doesn’t just store energy. It actively releases inflammatory cytokines, free fatty acids, and signaling molecules that influence insulin sensitivity, vascular function, and metabolic regulation.
In many ways, visceral fat behaves less like passive storage and more like an endocrine organ.
How Visceral Fat Disrupts Metabolism
Visceral fat acts like a rogue dispatcher, sending signals to multiple systems at once.
1. Immune System: Constant Inflammation
Visceral fat becomes packed with immune cells called macrophages. Instead of cleaning up, these cells release inflammatory cytokines like IL-6 and TNF-alpha.
Over time, this chronic inflammation:
- Damages blood vessels
- Increases clotting risk
- Accelerates metabolic and inflammatory aging
Image source: https://doi.org/10.1161/CIRCRESAHA.115.306885
Low grade systemic inflammation is one of the central mechanisms linking visceral fat to cardiometabolic disease.
2. Liver: Fatty Acid Overload
Visceral fat drains directly into the portal vein, sending free fatty acids straight to the liver.
This contributes to:
- Fatty liver (even in non-drinkers)
- Impaired insulin signaling
- Excess glucose release into the bloodstream
- A constant “store fat” signal
Elevated visceral fat is strongly correlated with hepatic fat accumulation independent of total body weight.
3. Pancreas: Insulin Overdrive
As liver and muscle cells stop responding to insulin, the pancreas compensates by making more.
But insulin is a storage hormone.
More insulin = more fat storage = more visceral fat.
Over time, this cycle contributes to prediabetes and type 2 diabetes, even in individuals whose body weight appears “normal.”
A reason why at PLC we offer blood glucose monitoring, we partner with Signos, a leading company in the blood sugar space to provide CGMs (continuous glucose monitors) to clients who can work with our dietitians to assess their blood sugar levels and patterns to reverse this.
Why the Scale Often Misses the Problem
Visceral fat can remain high even when:
- Weight is dropping
- Calories are restricted
- Cardio is increased
Especially when:
- Muscle mass is being lost
- Protein intake is inadequate
- Stress and cortisol are elevated
This is why people can be told they’re “losing weight” while their labs, energy, and waistline tell a very different story. At PLC we specifically assess these parameters with VF and DEXA scans and blood labs to make sure there are no “hidden” health risks.
How Visceral Fat Is Measured
Visceral fat cannot be accurately assessed by:
- BMI
- Scale weight
- Clothing size
The most reliable clinical tools are DEXA scans, CT scans, or MRI.
General DEXA-Based Visceral Fat Guidelines
(Ranges vary slightly by lab and device)
Men
- Optimal: <100 cm²
- Elevated risk: 100–160 cm²
- High risk: >160 cm²
Women
- Optimal: <80–100 cm²
- Elevated risk: 100–130 cm²
- High risk: >130 cm²
Waist circumference can serve as a screening tool, but imaging remains the gold standard.
Lab Patterns That Often Point to High Visceral Fat
Think of labs as early warning lights, not diagnoses.
Common functional patterns include:
- Triglycerides ≥150 mg/dL
- Low HDL cholesterol
- Fasting insulin >7–10 µIU/mL
- Fasting glucose creeping above 90 mg/dL
- A1C trending above 5.3%
- Elevated ALT or AST
- Low CO₂/bicarbonate
- A triglyceride-to-HDL ratio >2.0
These changes often precede formal cardiometabolic diagnoses by years. At PLC we make sure no stone is left unturned when it comes to your longevity and health.
How to Reduce Visceral Fat (What Actually Works)
You can’t spot-reduce visceral fat. But you can change the internal environment that allows it to thrive.
Nutrition Strategies
- Reduce processed and refined carbohydrates
- Keep carbohydrates to ~¼ of the plate per meal
- Prioritize whole-food carbs (beans, oats, quinoa, sweet potatoes)
- Pair carbs with protein, fiber, or fat
- Increase non-starchy vegetables for fiber and satiety
- Limit added sugars and high-fructose corn syrup
- Moderate calorie-dense fats (oils, nuts, nut butters)
- Reduce alcohol intake
Muscle & Metabolic Support
- Prioritize adequate protein intake
- Strength train consistently
- Avoid aggressive calorie deficits that sacrifice muscle
Lifestyle & Hormonal Support
- Support micronutrients involved in glucose and insulin signalingetrimental Impact of Ultra-Processed Foods on the Human Gut Microbiome. Nutrients. 2025.
- Improve sleep quality and duration
- Manage stress intentionally (chronic cortisol drives visceral fat)
- Increase daily movement and reduce sedentary time
Part 1, Recap
Visceral fat isn’t just fat. It’s a hormonal, inflammatory, metabolic disruptor.
You don’t need to fear fat…you need to understand which fat is running the show and how to change the conditions that keep it there.
When visceral fat decreases:
- Blood sugar regulation improves
- Lipids normalize
- Inflammation drops
- Energy returns
- Metabolism becomes more responsive
Often before the scale ever reflects it. And that’s real metabolic progress.
In part 2 and 3, we’ll dive into the specifics of what the current research says are the best ways to reduce VF through nutrition, movement and lifestyle so you can live a long, healthy, happy life.
References
- Fuster, J. J., Ouchi, N., Gokce, N., & Walsh, K. (2016). Obesity-induced changes in adipose tissue microenvironment and their impact on cardiovascular disease. Circulation Research, 118(11), 1786–1807. https://doi.org/10.1161/CIRCRESAHA.115.306885
- Hamooya, B. M., Siame, L., Muchaili, L., Masenga, S. K., & Kirabo, A. (2025). Metabolic syndrome: Epidemiology, mechanisms, and current therapeutic approaches. Frontiers in Nutrition, 12, Article 1661603. https://doi.org/10.3389/fnut.2025.1661603
- Geng, J., Wang, H., Yang, X., Yang, J., Xu, Y., Zhang, S., Zhang, X., & Li, X. (2025). Association between metabolic syndrome and cognition among adults: A systematic review and meta-analysis. Biomedicines, 13(10), 2376. https://doi.org/10.3390/biomedicines13102376
- Li, Y., Wang, Z., Zhang, Y., et al. (2025). Associations between metabolic syndrome and cognitive performance: Evidence from a large population-based study. Scientific Reports, 15, Article 1389. https://doi.org/10.1038/s41598-025-01389-1
- Wang, C., Liu, Y., Li, H., et al. (2023). Metabolic syndrome and cardiovascular disease: Mechanisms and clinical implications. Frontiers in Cardiovascular Medicine, 10, Article 1187735. https://doi.org/10.3389/fcvm.2023.1187735
- Petersen, M. C., Vatner, D. F., & Shulman, G. I. (2020). Regulation of hepatic glucose metabolism in health and disease. Cell Metabolism, 31(2), 209–223. https://doi.org/10.1016/j.cmet.2019.11.004