Yeah I was just teasing. Fasting has worked for many.
I just exercise a little more and cut some sugar and night snacks, my favorite thing.
And I do that every time I go up more than 3-4 pounds and stay there more than a few days. My secret is to never let it go far enough to need serious anything, just a little tweaking and it’s all good.
If you take care when that scale goes up or down, yes you can be too thin, you will never have any major problems.
My mom is 80 and probably could still fit into her wedding dress. She is not crazy about it but she has always made sure to keep an eye on the scale. Five pounds either way and she makes an adjustment.