Most people benefit from losing 5 to 10 percent of their current body weight, which is enough to meaningfully improve blood sugar, cholesterol, and liver health. For a 200-pound person, that’s 10 to 20 pounds. Beyond that, how much you should lose depends on where you’re starting, your age, and whether you have specific health conditions you’re trying to reverse.
There’s no single number that works for everyone, but there are clear thresholds backed by research that can help you set a realistic, useful target.
Why 5 Percent Is the First Real Milestone
A study from Washington University School of Medicine found that people with obesity who lost just 5 percent of their body weight saw significant improvements in how their bodies processed insulin, including better insulin sensitivity in fat tissue, liver, and muscle. Their total body fat decreased, and fat stored in the liver dropped substantially. The liver and fat tissue essentially maxed out their metabolic improvements at that 5 percent mark, though muscle tissue continued to benefit with further weight loss.
For someone weighing 250 pounds, 5 percent is about 12.5 pounds. That’s a modest, achievable goal that delivers outsized health returns, particularly if you carry extra weight around your midsection. It’s a strong starting point if the idea of losing 50 or 80 pounds feels overwhelming.
Using BMI as a Starting Reference
BMI isn’t perfect, but it gives you a quick way to estimate where you fall. The CDC defines the categories for adults 20 and older as follows:
- Underweight: below 18.5
- Healthy weight: 18.5 to 24.9
- Overweight: 25 to 29.9
- Obesity (Class 1): 30 to 34.9
- Obesity (Class 2): 35 to 39.9
- Severe obesity (Class 3): 40 or higher
A 5’6″ person with a BMI of 30 weighs about 186 pounds. Getting into the “healthy weight” range would mean reaching roughly 154 pounds, a loss of about 32 pounds. That might be a reasonable long-term goal, but it doesn’t mean you need to get there all at once, or at all, to see real health improvements.
BMI also doesn’t distinguish between fat and muscle, and it doesn’t tell you where your fat is stored. Two people with the same BMI can have very different metabolic profiles. Research published in Cell Metabolism compared people with obesity who were metabolically healthy to those who were metabolically unhealthy at the same BMI range. The metabolically healthy group had triglycerides around 69 mg/dL compared to 154 in the unhealthy group, higher HDL (“good”) cholesterol, and normal blood sugar. In other words, scale weight alone doesn’t determine your health risk.
Measurements That Matter Beyond the Scale
Waist circumference is one of the better predictors of the kind of fat that drives heart disease and diabetes risk. According to Harvard Health, the thresholds that signal higher risk are 35 inches or more for women and 40 inches or more for men. A waist-to-hip ratio above 0.9 for women or 1.0 for men also indicates elevated risk.
Body fat percentage gives you another lens. A 2025 study using national survey data defined overweight as body fat of at least 25 percent for men and 36 percent for women. Obesity was defined as 30 percent or more for men and 42 percent or more for women. There’s no universally agreed-upon ideal range, but these numbers give you a rough target if you have access to body composition testing through a gym, doctor’s office, or smart scale.
Larger Losses for Specific Health Goals
If you have type 2 diabetes, the amount of weight you lose has a direct, almost linear relationship with your chances of remission. A systematic review in The Lancet Diabetes & Endocrinology found that for every 1 percentage point of body weight lost, the probability of complete diabetes remission increased by about 2.2 percentage points. The practical breakdown is striking: among people who lost less than 10 percent of their body weight, only about 1 percent achieved complete remission at one year. Among those who lost 20 to 29 percent, nearly half did. And at 30 percent or more weight loss, about 79 percent achieved complete remission.
These are large losses, often requiring medical interventions like GLP-1 medications or surgery. But they illustrate an important point: if you’re managing a weight-related condition, your target may be higher than the general 5 to 10 percent guideline, and the payoff can be substantial.
How Fast You Should Lose It
The CDC recommends losing 1 to 2 pounds per week. People who lose weight at this pace are more likely to keep it off than those who drop weight quickly. The old rule of thumb, that cutting 500 calories a day produces one pound of weight loss per week, turns out to be an oversimplification. The Mayo Clinic notes that a 500-calorie daily reduction more realistically leads to about half a pound to one pound per week, and results vary by body size, sex, and activity level.
Part of the reason is that when you lose weight, you don’t just lose fat. You lose a mix of fat, muscle, and water. With GLP-1 medications, for example, 25 to 40 percent of total weight lost is lean tissue rather than fat. That’s one reason strength training and adequate protein intake matter during any weight loss effort.
Why Weight Loss Slows Down
Nearly everyone hits a plateau, and it’s not a willpower problem. It’s a biological response called adaptive thermogenesis. When you lose weight, your body’s energy expenditure drops more than you’d expect based on your smaller size alone. Your metabolism essentially becomes more efficient, burning fewer calories than predicted, which creates conditions that favor weight regain.
This means the calorie deficit that worked in month one may not produce the same results in month four. You may need to adjust your intake or activity level, or simply accept that the rate of loss will slow. Planning for this in advance helps you avoid frustration and stick with the process.
Special Considerations for Adults Over 65
Weight loss in older adults requires more caution. Skeletal muscle mass already declines by 3 to 8 percent per decade starting around age 30, with a sharper drop in women around menopause. Losing weight on top of that age-related decline raises the risk of sarcopenic obesity, where you have both low muscle mass and excess fat. The combination increases fall risk, reduces mobility, and can worsen overall health even as the number on the scale improves.
Body composition also shifts with age: visceral fat (the deep abdominal fat around organs) increases while the type of fat that helps regulate metabolism decreases. This means BMI becomes less reliable as a health indicator for older adults. Standard BMI cutoffs were developed for younger populations and may not apply the same way after 65. If you’re in this age group and considering weight loss, the priority is preserving muscle through strength training and higher protein intake rather than chasing a specific number on the scale.
Setting Your Target
Start with 5 percent of your current weight. That’s the threshold where metabolic improvements begin, and for many people it’s achievable within two to three months at a safe pace. If you reach that and feel good, aim for 10 percent. Beyond that, your target depends on your health situation: whether you’re trying to get your waist circumference below a risk threshold, bring blood sugar into a normal range, or reach a BMI that puts you in a lower risk category.
The number that matters most is the one you can maintain. Losing 30 pounds and regaining 35 is worse than losing 15 and keeping it off. Whatever target you choose, the research consistently points to gradual loss, strength training to protect muscle, and realistic expectations about how your body will adapt along the way.