How long can a weight loss plateau last?

A weight loss plateau can last anywhere from a few weeks to several months. Most plateaus last 2-6 weeks. They happen because your body adapts to your new weight and the calorie deficit. If a plateau lasts longer than 4-6 weeks despite following your plan correctly, it's time to make changes like adjusting calories, changing your exercise routine, or consulting a healthcare professional to rule out underlying issues.