human
I've recently lost a lot of weight, but now I'm having a hard time keeping it off.
assistant
You may be experiencing what's called "weight cycling" or "yo-yo dieting". It's common for people to lose and gain back the same amount of weight multiple times throughout their lives. This is due to changes in hormones that regulate appetite and metabolism. To prevent this from happening, you should focus on eating healthy foods in appropriate portions and exercising regularly.