In modern healthcare, there is no single “normal” weight that applies to everyone. Instead, doctors use a desired weight range based on factors like height, age, gender, and—crucially—ethnic background.
The most common tool to determine desired weight is the Body Mass Index (BMI). This is a simple calculation:
BMI = weight (kg) / height (m)2
Standard WHO BMI Categories for Adults
For most adults of White/European descent, the World Health Organization (WHO) defines the following ranges:
| Category | BMI Range | Health Implication |
| Underweight | Less than 18.5 | Risk of nutritional deficiencies |
| Healthy Weight | 18.5 – 24.9 | Lowest risk for chronic disease |
| Overweight | 25.0 – 29.9 | Increased risk of Type 2 Diabetes/Heart Disease |
| Obese | 30.0 or Higher | High risk of metabolic complications |
Recent clinical data (2025–2026) has confirmed that “one size does not fit all.” Different ethnic groups carry fat differently and face health risks at different weights.
South Asian, Chinese, and Middle Eastern Populations
Research shows that individuals from these backgrounds have a higher risk of Type 2 Diabetes and heart disease at a lower BMI. Consequently, the “Healthy” threshold is lower:
Overweight: BMI ≥ 23.0
Obese: BMI ≥ 27.5
Black and African-Caribbean Populations
While standard thresholds (BMI 30) are often used, some 2026 studies suggest that at the same BMI, Black individuals may have higher muscle mass and lower visceral fat than White individuals.
However, the risk for hypertension and diabetes remains high, making clinical assessment essential beyond just the number.
While BMI is a helpful screening tool, it is not a perfect measure of health. It does not account for:
Muscle Mass: Athletes may have a “high” BMI but very low body fat.
Bone Density: Naturally heavy frames can skew results.
Fat Distribution: “Belly fat” (visceral fat) is much more dangerous than fat stored in the hips.
The 2026 “Beyond BMI” Checklist
Doctors now use a combination of metrics to determine a “desired weight”:
Waist Circumference: Generally, health risks increase if your waist is >94cm (men) or >80cm (women).
Waist-to-Height Ratio: A ratio of 0.5 or less is considered ideal for most adults.
Body Composition: Measuring the percentage of fat versus lean muscle.
In the United States and UK, “average” weight is currently higher than the “desired” weight ranges:
US Average (Men): 90 kg (~199 lbs), with an average BMI of ~29.
US Average (Women): 77 kg (~171 lbs) with an average BMI of ~29.
Global Trends: As of 2025, the adult obesity rate in the US has seen its first slight decline in decades (falling to 37%), largely attributed to the increased use of GLP-1 medications like Wegovy and Mounjaro.
A “desired weight” is the weight at which your risk for chronic disease is lowest. For a White adult, that is usually a BMI of 18.5–25; for a South Asian adult, it is 18.5–23.
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