Types of body fat aren’t all the same, and lumping them together is why so much fat-loss advice misses the point. AnilKK, an INFS-certified nutrition and fitness coach with 24 years of experience and 1,000+ weight management clients, breaks down what each type of fat actually does in your body, which ones matter for health, and what a healthy body fat percentage really looks like — with the confusing hormone explanations stripped out.
Quick Answer: Your body stores fat in three main locations — essential, subcutaneous, and visceral — made up of white, brown, or beige fat cells. Essential fat (about 3% for men, 12% for women) is necessary for survival. Subcutaneous fat under the skin is mostly harmless in moderate amounts. Visceral fat around your organs is the type most linked to disease risk, and it’s the one worth prioritizing for reduction.
Table of Contents
What Is Body Fat?
Body fat refers to the fat cells stored throughout the body, and their main job is energy storage — holding onto calories from food until the body needs them later. That’s the primary function, but fat cells also insulate the body and cushion internal organs.
Most of the body’s fat sits directly under the skin, but a meaningful portion is also stored around internal organs, where it plays a protective role. Not all fat behaves the same way, though — which is where the different types come in.
The 3 Types of Body Fat Cells
Body fat comes in three cell types — white, brown, and beige — and gets stored in three locations: as essential fat, subcutaneous fat, or visceral fat. Each type serves a different function: some support healthy metabolism and hormone regulation, while excess amounts of others are linked to chronic disease risk, including diabetes, heart disease, and hypertension.
Brown Fat
Brown fat’s main job is generating heat and burning energy to regulate body temperature. Unlike white fat, it isn’t primarily a long-term energy store — it’s metabolically active tissue that burns calories directly, which makes it particularly useful in cold conditions.
Higher brown fat activity is associated with a healthier distribution of fat overall — more subcutaneous relative to visceral fat, which lowers the risk of conditions like fatty liver disease. You don’t need to actively “manage” brown fat levels; keeping essential fat at a healthy level supports normal brown fat function on its own.
Essential Fat
Essential fat lives up to its name — it’s the fat your body genuinely needs to function, supporting reproductive hormone production, temperature regulation, and vitamin absorption. It’s distributed throughout the body rather than concentrated in one visible area.
Because this fat is essential, it’s not the type to target when losing weight — dropping below the essential fat range (roughly 3% for men, 12% for women) through extreme dieting or excessive exercise causes real health problems, not fat loss benefits. If you’re planning a structured cutting phase, our guide to protein needs covers how to preserve muscle while losing fat safely.
White Fat
White fat is the body’s primary long-term energy storage tissue, and it’s also an active hormone-producing organ — not just inert storage. Research on adipose tissue hormones confirms it releases two different hormones with distinct jobs: leptin, which signals the brain to regulate appetite and energy expenditure, and adiponectin, which improves insulin sensitivity and helps regulate blood sugar. These are separate hormones with separate functions, though both come from the same fat tissue.
In healthy amounts, white fat’s hormone signaling works well. In excess, that signaling breaks down — higher white fat levels are linked to insulin resistance and a higher risk of related health issues. Visible signs of excess white fat commonly show up on the thighs, hips, and abdomen. Building muscle through resistance training is one of the more effective ways to shift this balance, since muscle tissue burns more calories at rest than fat does.
Beige Fat
Beige fat cells sit functionally between white and brown fat — under the right conditions, they can burn energy similarly to brown fat cells. Cold exposure is the main trigger for this “browning” process, activating both beige and brown fat activity.
Physical stress on the body — specifically exercise — is also thought to trigger white fat converting toward beige fat, partly through the release of a hormone called irisin. This is one of the more genuinely useful angles for fat loss: consistent exercise, particularly higher-intensity work, appears to support this conversion process, adding a metabolic benefit beyond the calories burned during the workout itself. Our treadmill workout guide has interval-based routines that fit this approach well.
Visceral Fat
Visceral fat is white fat stored in the abdomen and around internal organs, and it’s the type most worth paying attention to. Excess visceral fat is linked to a meaningfully higher risk of insulin resistance, and research has connected elevated visceral fat to increased risk of conditions including Alzheimer’s disease, certain cancers, and stroke. Visceral fat levels also tend to increase with age independent of overall weight change.
Diet is one of the most effective levers for reducing visceral fat specifically. Prioritizing lean proteins, unsaturated fats, whole grains, and fiber over processed foods makes a real difference, and getting 7-9 hours of quality sleep supports the same goal. If heart health is also a concern alongside visceral fat, our guide to low-cholesterol protein options covers protein choices that support both goals together.
Some research also suggests resistance training may be more effective than steady-state cardio alone for reducing visceral fat specifically, though both contribute to overall fat loss.
Subcutaneous Fat
Subcutaneous fat — the fat directly beneath the skin — makes up roughly 90% of total body fat and is genuinely a mixed bag for health. In moderate amounts, it’s a normal cushioning layer between muscle and skin. Women typically carry more of it than men, largely due to estrogen’s role in fat distribution.
Excess subcutaneous fat, particularly around the abdomen, does increase health risks, though generally less than an equivalent excess of visceral fat. It’s also notoriously stubborn to lose, since the body treats it partly as an energy reserve to protect against future food scarcity. A calorie deficit built on whole foods, combined with consistent high-intensity exercise, remains the most reliable way to reduce it over time — there’s no shortcut that replaces that combination.
What Is a Healthy Body Fat Percentage?
Fat gets treated as the enemy of good health in most diet culture, but the body genuinely needs a baseline amount of it — for warmth, nutrient absorption, and hormone function. The real question is how much is actually healthy.
Classification tables based on NIH and WHO body composition guidelines put the healthy range for men aged 20-39 at roughly 8-20%, and for women the same age at roughly 21-33%, with both ranges shifting slightly upward with age. Essential fat — the non-negotiable minimum — sits around 3% for men and 12% for women, well below these healthy ranges.
BMI has traditionally been used as a rough proxy for body fat percentage, but it doesn’t actually measure body composition — a muscular person and a sedentary person can share the same BMI while having very different fat percentages. An MRI or CT scan gives the most accurate reading, but these are too expensive and invasive to justify for this purpose alone. Skinfold calipers, done by a trained professional, or a bioelectrical impedance scale are more practical options for most people.
A few things worth keeping in mind when comparing yourself to any chart: women naturally carry more body fat than men at the same BMI, older adults naturally carry more than younger adults at the same BMI, and athletes typically run lower than non-athletes. These aren’t flaws in the numbers — they’re just real variation the averages don’t capture. For a broader look at supporting a healthy body composition through diet, our guide to protein powders for weight loss covers how protein intake fits into fat loss specifically.
Which Type of Fat Should You Actually Try to Reduce?
If you’re prioritizing, visceral fat is the one that matters most for long-term health — it carries the strongest links to serious disease risk among the fat types covered here. Subcutaneous fat matters more for appearance and comfort than for acute health risk in most people, though excess amounts still carry some risk.
Essential fat is never the target, no matter how aggressive a diet or training plan is. The good news is that the same core habits — a diet built around whole foods, consistent resistance and cardio training, and adequate sleep — reduce visceral and excess subcutaneous fat simultaneously. There’s no need for fat-type-specific training beyond making sure resistance training is part of the mix alongside cardio — a well-rounded routine addresses visceral and subcutaneous fat at the same time, rather than needing a separate approach for each.
Frequently Asked Questions
What are the 3 main types of body fat?
The three main storage types are essential fat, subcutaneous fat, and visceral fat, made up of white, brown, or beige fat cells. Essential fat is necessary for survival, subcutaneous fat sits under the skin, and visceral fat surrounds internal organs.
Which type of body fat is the most dangerous?
Visceral fat carries the strongest links to serious health conditions, including insulin resistance, cardiovascular disease, and certain cancers. It’s the type most worth prioritizing for reduction, more so than subcutaneous fat.
What is the difference between visceral and subcutaneous fat?
Visceral fat is stored around internal organs in the abdomen and carries a stronger link to disease risk. Subcutaneous fat sits directly under the skin, makes up about 90% of total body fat, and is comparatively less harmful in moderate amounts.
What is a healthy body fat percentage?
Based on NIH and WHO classification guidelines, a healthy range for men aged 20-39 is roughly 8-20%, and for women the same age is roughly 21-33%, with both shifting slightly upward with age. Essential fat, the non-negotiable minimum, is around 3% for men and 12% for women.
Can you turn white fat into brown fat?
White fat can convert into beige fat, which behaves similarly to brown fat, through triggers like cold exposure and exercise. This process is sometimes called browning, and higher-intensity exercise appears to support it through the release of a hormone called irisin.
Why is visceral fat harder to see than subcutaneous fat?
Visceral fat is stored deep around internal organs rather than just beneath the skin, so someone can have a high visceral fat level without looking overweight. This is why body fat percentage and waist measurements are more useful indicators than appearance alone.
Does exercise reduce visceral fat specifically?
Yes. Both cardio and resistance training reduce visceral fat, and some research suggests resistance training may have a specific edge for visceral fat reduction beyond general calorie burn. Combining both with adequate sleep and a whole-food diet is the most effective overall approach.
Is BMI an accurate way to measure body fat percentage?
No, not directly. BMI is based only on height and weight, so it can’t distinguish between muscle and fat mass, meaning two people with identical BMIs can have very different body fat percentages. Skinfold calipers, bioelectrical impedance scales, or medical imaging give a more accurate picture.
