I wasn't expecting my comment to blow up like it did. I would reply to kleinbloo, but he blocked me. I could write out a long detailed response and PM it to him (Edit: no, I probably couldn't have done that since apparently the block function does include a PM mute) but frankly I know he won't listen based on how hard he blew up after my initial comment. So I'll just write a response to you and anyone else in the thread that hasn't blocked me can just read this:

Kleinbloo's endocrine issues are likely causing him extreme fatigue when he eats at a caloric deficit, something I would think is especially likely since he mentioned having to increase intake by about 500 calories in order to not feel light-headed after riding. That is understandable, and I admit that I started writing my standard boilerplate "it's all about CICO" response as soon as I saw his statement that he was eating at an extreme deficit and not losing weight, without reading the rest of his comment first.

However, regardless of the effects his endocrine system are having on his body, they are not allowing him to eat at a sustained caloric deficit without losing weight. It simply isn't possible, and no matter how long and detailed of a response you write, that won't change. That ~15 miles/day of riding that he mentioned (1000 miles over the last 2 months)? The 500 calories he added would be about right to cover that extra burn; for most people cycling burns between 25 and 40 calories per mile, or around 375-600 calories for his mentioned daily riding.

His medical issues may make it difficult, or maybe even unsafe, in a way that isn't fair to him, to lose weight. I'll admit my initial comment was rushed and insensitive since I didn't take the time to read his entire comment before writing mine. His endocrine issues may be reducing his caloric expenditure, making it so that the recommended intake from MyFitnessPal is too high. While he may have legitimate medical issues that make his case somewhat different and may even make an attempt at weight loss inadvisable, those issues do not, and cannot, give him free-energy-from-nothing superpowers.

The above discussion was for your benefit, and for the benefit of others on the Internet you may come across. Ending it here, and forever, is for mine.