If you lose more than 5% of your weight in 6 to 12 months, tell your doctor, especially if you’re an older adult. That would be about 8 pounds if you weigh 150, or 10 pounds if you weigh 200. Sudden weight loss without a reason can be a sign of a health problem.
If your thyroid gland makes too much thyroid hormone, it revs up your metabolism so you burn more calories and lose weight. You also may have more bowel movements and a racing heartbeat, and you may feel anxious. Your doctor can help you manage it with medicine. She may also talk to you about surgery to take out all or part of your thyroid.
Insulin is a hormone your body makes to turn blood sugar into energy. If you have diabetes, you either can’t make insulin or can’t use it the way you need to. When your cells run out of fuel, your body thinks it’s starving and starts burning fat and muscle. This makes you lose weight. You may also be thirsty, tired, hungry, or pee more than usual.…