A girl can lose weight due to intentional efforts (diet/exercise) or unintentionally from underlying issues like metabolic conditions (overactive thyroid, diabetes), digestive problems (celiac, IBD), mental health factors (stress, depression, eating disorders), medication side effects, infections, or even hormonal shifts. Unexplained weight loss needs medical attention to rule out serious causes like cancer or chronic diseases.
Some causes of unintentional weight loss include: mental health conditions, such as depression, anxiety, eating disorders and obsessive compulsive disorder (OCD) problems with digestion, such as coeliac disease or inflammatory bowel disease (IBD) hormone conditions, such as an overactive thyroid or type 1 diabetes.
Contact your provider if: You or a family member loses more weight than is considered healthy for their age and height. You have lost more than 10 pounds (4.5 kilograms) or 5% of your normal body weight over 6 to 12 months or less, and you do not know the reason. You have other symptoms in addition to the weight loss.
The fastest way to lose weight for women is to eat a healthy, balanced diet and to exercise regularly. This should include a combination of cardiovascular exercise and strength training. Additionally, it is important to reduce stress and get adequate sleep in order to support weight loss.
The differences between men and women with regard to body composition and metabolism have been well studied. Put simply, men generally have higher muscle-to-fat mass ratio and metabolism. This makes weight loss easier for men. These differences start in puberty and persist throughout adulthood.
The 3-3-3 rule for weight loss is a simple, habit-based method focusing on three key areas: 3 balanced meals a day, 3 bottles (or ~1.5L) of water by 3 PM, and 3 hours of physical activity per week, aiming for consistency over complex diets. It simplifies fat loss by establishing rhythm through consistent eating, adequate hydration to support metabolism, and regular movement, promoting sustainable health without intense calorie counting or restrictive rules, says Five Diamond Fitness and Wellness, Joon Medical Wellness & Aesthetics, and EatingWell.
Unexplained weight loss
If you've lost more than 5% of your body weight during the past 6 to 12 months talk to your health care provider.
Women tend to lose weight in their legs first, but you might notice weight loss in other areas at the start of your weight loss journey. Factors affecting where you lose weight first include sex, age, genetics, body mass index (BMI), and diet choices.
Eat small, frequent meals to help build a healthy appetite. Plan for 3 meals and 2-3 snacks each day. Quick Snack ideas – crackers and cheese, yogurt and fruit, peanut butter toast, fruit and nut mixes, hard boiled eggs, tuna or egg salad on crackers.
Some types of cancer can also make it harder for your body to absorb nutrients (called malabsorption). Weight loss may be more common in lung cancer and upper gastrointestinal cancers such as pancreatic, stomach and esophageal cancer.
Key Takeaways. The four stages of weight loss are rapid initial weight loss, steady but slower weight loss, a plateau, and maintenance. Learning about each stage can help you develop a sustainable weight loss plan and prepare for expected setbacks.
It is often normal to lose a noticeable amount of weight after, for example, the stress of changing jobs, divorce, redundancy or bereavement. Weight often returns to normal when you begin to feel happier.
Long-term conditions, particularly in later stages of disease
You may be born naturally small and your low BMI can be due to your genes. You may have a very high metabolism and find it hard to put on weight, even if you eat foods that have a lot of calories. You may not follow a healthy, balanced diet because you forget to eat or cannot afford nutritious foods.
How do you stop losing weight? Increase your calorie intake and try to eat multiple small meals throughout the day. Reduce the amount of cardio you do, and instead, increase strength training. Eat more protein, healthy fats, and complex carbohydrates.
The hormones leptin and insulin, sex hormones and growth hormone influence our appetite, metabolism (the rate at which our body burns kilojoules for energy), and body fat distribution. People who are obese have levels of these hormones that encourage abnormal metabolism and the accumulation of body fat.
The thigh and butt area is the most common spot for women to lose weight first. But this depends on genetics and hormone levels in the body, so you may not be able to target those specific areas if they're not your problem area.
Some diseases — like diabetes or Addison's disease — can progress quickly. Others — like cancer — may progress more slowly. Seek medical care as soon as you notice that you've lost 10 pounds or more than 5% of your body weight without trying to. This will give you the best chance of recovery.
The 3-3-3 rule for weight loss is a simple, habit-based method focusing on three key areas: 3 balanced meals a day, 3 bottles (or ~1.5L) of water by 3 PM, and 3 hours of physical activity per week, aiming for consistency over complex diets. It simplifies fat loss by establishing rhythm through consistent eating, adequate hydration to support metabolism, and regular movement, promoting sustainable health without intense calorie counting or restrictive rules, says Five Diamond Fitness and Wellness, Joon Medical Wellness & Aesthetics, and EatingWell.
While cancer and GI issues and mental health cause most unintentional weight loss, there are many other reasons you might suddenly lose weight, including: Dementia, due to changes in mealtime habits. Endocrine issues, including thyroid disorders and diabetes.
Daily: The most common form of intermittent fasting is a daily fast for 12 to 16 hours. For a 16-hour fast, this would result in an 8-hour feeding window during a 24-hour period. A “16:8” fast might look like eating breakfast at 11am and finishing dinner by 7pm.
Adele's significant weight loss wasn't from a quick fix but a two-year journey combining intense strength training, Pilates, hiking, boxing, and cardio, alongside major lifestyle changes focused on managing anxiety, not restrictive diets like the Sirtfood Diet, with workouts happening multiple times daily for mental and physical strength. Her routine included morning weights, afternoon hikes or boxing, and evening cardio, emphasizing getting stronger, which naturally led to fat loss and improved well-being.
People naturally lose muscle after 40, especially women after menopause. Because muscle burns more calories than fat, this can slow down your metabolism and make it harder to shake those stubborn pounds.