The Basics: Body Fat Percentage
Understand how body fat percentage reflects your body composition and metabolic health.
What is Body Fat Percentage?
Body fat percentage is the proportion of your total body weight that comes from fat. This includes both essential fat, which your body needs for normal physiological function, and storage fat, which is the extra fat your body carries. Storage fat includes subcutaneous fat, found under the skin, and visceral fat, which is stored around the organs and is associated with greater health risk when present in excess.
It is one of the clearest overall markers of body composition, or how much of your body is made up of fat relative to lean tissue like muscle, bone, and water. Because body composition influences metabolism, hormones, physical function, and long-term health, body fat percentage can be a more useful indicator than weight alone.
Interpreting Your Body Fat Percentage
Body fat percentage should be interpreted relative to your age and sex, since healthy ranges differ between men and women and can shift across the lifespan (InBody USA, 2025)..
Too little body fat can interfere with hormone function, cholesterol production, and energy levels, while too much body fat is associated with increased risk of chronic disease, including heart disease and diabetes.
For that reason, body fat percentage is most useful when viewed as a range rather than a target to minimize. In general, the goal is not to have as little body fat as possible, but to maintain a healthy level that supports metabolic health, hormone function, and long-term well-being.
Why Body Fat Percentage Matters
Body fat percentage is one of the clearest markers of body composition, showing how much of your body is made up of fat rather than lean tissue. It can offer more useful health context than weight alone, since two people can weigh the same but have very different amounts of fat and muscle.
It is also closely linked to long-term health. In a systematic review and meta-analysis of 35 prospective cohort studies including 923k+ participants, each 10% increase in body fat percentage was associated with an 11% higher risk of all-cause mortality (Jayedi et al., 2022). In NHANES-based data, the lowest mortality risk was seen around 25–30% body fat in men and 30–35% in women, suggesting that both very low and very high body fat levels can carry risk (Dong et al., 2018).
Body fat distribution also matters. Visceral fat, the fat stored around the organs, is more strongly linked to metabolic and cardiovascular risk than subcutaneous fat. In the same meta-analysis, each 1 standard deviation increase in visceral fat was associated with a 17% higher risk of all-cause mortality (Jayedi et al., 2022).
How to improve (or maintain) a healthy Body Fat Percentage
- Eat a balanced diet: Dietary patterns that support energy balance and adequate protein intake help improve body composition over time.
- Strength train regularly: Resistance training helps preserve or build lean mass while improving overall body composition.
- Add regular cardio: Aerobic activity supports energy expenditure and cardio-metabolic health.
- Prioritize sleep and stress management: Sleep and chronic stress can affect energy balance, hormonal regulation, and body composition.
Maintaining a healthy body fat percentage is one of the most effective ways to support better metabolic health, hormone balance, and long-term well-being.
