Losing weight in a healthy way comes down to a modest calorie deficit, enough protein, regular movement, and consistency over months rather than weeks. People who lose 1 to 2 pounds per week are more likely to keep the weight off than those who lose it faster. That pace might feel slow, but it protects your muscle mass, keeps your energy stable, and avoids the rebound weight gain that crash diets almost always produce.
How Much to Lose Per Week
The CDC recommends aiming for 1 to 2 pounds of weight loss per week. At that rate, you’re looking at roughly 4 to 8 pounds per month, which adds up to meaningful change over a few months without the downsides of aggressive dieting. Losing faster than that typically requires cutting calories so low that your body starts breaking down muscle for energy, your metabolism slows, and you feel terrible.
To lose about one pound per week, you need a daily calorie deficit of roughly 500 calories. You can get there by eating less, moving more, or some combination. Most people find it easier to split the difference: trim 250 to 300 calories from food and burn the rest through activity. That might look like skipping a sugary drink and taking a 30-minute walk.
What to Eat (and How Much Protein)
You don’t need a specific diet plan. What matters is eating fewer calories than you burn while still getting enough nutrients to feel good and preserve muscle. A few principles make this simpler in practice.
Protein is the most important thing to get right. When you’re in a calorie deficit, your body doesn’t just burn fat. It also breaks down some muscle tissue. Eating enough protein dramatically reduces that muscle loss. Research on body composition during calorie restriction consistently shows that intakes around 1.6 to 2.4 grams of protein per kilogram of body weight per day protect lean mass. For a 170-pound person, that works out to roughly 120 to 185 grams of protein daily. You don’t need to hit the top of that range unless you’re doing serious strength training, but most people undereat protein when they’re cutting calories. Prioritizing a protein source at every meal (eggs, chicken, fish, Greek yogurt, beans, tofu) is the simplest way to stay on track.
Fiber is the other nutrient worth paying attention to. A study published in the Annals of Internal Medicine found that simply aiming for 30 grams of fiber per day helped people lose weight, lower blood pressure, and improve insulin sensitivity, even without following a complicated diet plan. Fiber slows digestion and keeps you feeling full longer, which makes it much easier to eat less without feeling hungry. Vegetables, fruits, whole grains, beans, and lentils are all high-fiber foods. Most people eat about half the fiber they should.
Beyond protein and fiber, focus on whole, minimally processed foods most of the time. That doesn’t mean you can never eat pizza. It means that when the majority of your meals are built around vegetables, lean proteins, whole grains, and healthy fats, you naturally eat fewer calories without needing to count every one.
Cardio, Strength Training, or Both
Both types of exercise help, but they do different things. Research comparing the two consistently finds that cardio produces more total weight loss on the scale, while strength training preserves significantly more muscle. In one study, people who only did cardio lost about 5% of their lean mass, while those who combined cardio with resistance training lost only 2 to 3%. That difference matters because muscle is metabolically active tissue. The more you keep, the higher your resting metabolism stays, and the easier it is to maintain your weight loss long term.
Cardio also burned slightly more fat mass overall, about 1.15 kilograms more than resistance training alone in pooled analyses. But the combination of both is where the real advantage lies. You get the calorie burn from cardio and the muscle-preserving effect of lifting weights. If you have to choose just one, strength training two to three times per week paired with daily walking is a solid starting point. Add dedicated cardio sessions as your fitness improves.
The best exercise routine is one you’ll actually do consistently. If you hate running, don’t run. Swim, bike, hike, dance, play a sport. Enjoyment is the single biggest predictor of whether you’ll still be doing it three months from now.
Sleep Matters More Than You Think
Poor sleep makes weight loss harder in ways that go beyond just feeling tired. When you’re sleep-deprived, you make worse food choices, crave higher-calorie foods, and have less willpower to resist them. You also move less during the day without realizing it, which cuts into your calorie deficit.
The hormonal picture is more nuanced than popular advice suggests. Earlier studies claimed that sleep deprivation dramatically altered hunger hormones, but a more recent meta-analysis found no statistically significant changes in ghrelin or leptin levels after sleep restriction. That doesn’t mean sleep doesn’t affect appetite. It likely works through other pathways: impaired decision-making, increased reward-seeking behavior, and simple fatigue that makes cooking a healthy meal feel impossible. Aim for 7 to 9 hours per night. If you’re consistently getting less than 6, improving your sleep may do more for your weight than tweaking your diet.
Building Habits That Last
The hard part of weight loss isn’t losing it. It’s keeping it off. Most people who lose significant weight regain a portion of it within two years. The difference between those who maintain their results and those who don’t comes down to behavioral patterns, not willpower.
Research on long-term weight maintenance identifies several strategies that work. Regular self-weighing (weekly, not daily) helps you catch small regains before they become large ones. Multicomponent approaches that combine dietary changes with physical activity and some form of accountability showed the strongest evidence for sustained results in randomized trials. Setting specific, concrete goals (“I’ll walk for 20 minutes after lunch on weekdays”) outperforms vague intentions (“I’ll exercise more”).
Tracking what you eat, at least initially, builds awareness of portion sizes and calorie density that sticks with you even after you stop logging. You don’t need to track forever. A few weeks of honest food logging teaches most people things about their eating patterns they didn’t know, like how many calories are in their daily coffee order or how much oil they use when cooking.
Planning for setbacks is just as important as planning meals. You will have bad days, vacations, holidays, and stressful weeks. The goal isn’t perfection. It’s returning to your routine quickly rather than letting a bad weekend turn into a bad month.
When Medical Support Helps
Most people can lose weight safely on their own with the strategies above. But medically supervised programs become worth considering if you have conditions like type 2 diabetes, high blood pressure, obstructive sleep apnea, or severe acid reflux that would improve with even 10 to 20 pounds of weight loss. In those cases, a structured program with meal replacements and clinical monitoring can help you lose weight safely while managing those conditions simultaneously.
For people with a BMI in the obesity range who haven’t had success with lifestyle changes alone, newer prescription medications are now part of the clinical toolkit. In 2025, the World Health Organization issued its first guideline conditionally recommending certain injectable medications for long-term obesity treatment in adults, as part of a comprehensive approach that still includes diet, activity, and professional support. These medications are not a shortcut, and long-term data is still limited, but they represent an option for people whose weight poses a serious health risk.