cphite, I used to be 75kg and now I'm less than 55kg. I have stuffed myself to the gills and yet my body doesn't seem to be storing fat anymore. Maybe I've gotten what Captain America had before his "experiment" and can't seem to gain weight anymore
Look, dude, if you are suddenly unable to gain weight no matter what you eat when previously it was a significant issue, I'm not joking, that is a literal indicator for cancer. A big one, actually.
You're saying you've lost ~40 pounds. You indicate you did some diet changes to achieve that, so it's not that troubling.
Here's the thing- If you inexplicably lose ~10 pounds (5kg) in 3 months, TALK TO A DOCTOR.
Virtually *EVERYONE* who gets the most aggressive kinds of cancer (Pancreatic, the worst forms of esophageal, stomach, lung) has the "inexplicable weight loss" prior to diagnosis.
There are endless anecdotes of the guy or gal who is initially excited at their "new" ability to "eat anything" and "lose weight" until someone tells them they maybe ought to see a doctor and then they're dead in weeks
If it is truly inexplicable, it likely isn't some COMIC-BOOK affliction( SRSLY?!? ), but rather tumor-related cachexia which adversely affects your prognosis to the same degree it affects your weight.
Now, yes, you are explaining that inverse of this (you lost weight through explicable means, but now inexplicably cannot gain it back), but that could just be the flip side of the same coin that you only coincidentally associate with your (deliberate) previous weight loss, understand?
In other words: SEE. A. (REAL). DOCTOR. IMMEDIATELY!
(assuming this isn't just misunderstanding or false advertising)