From the other side of the consultation, briefly.

Therapy insights from my mental health journey: my therapist introduced me to the concept of "identity updating" — the psychological work of becoming a new version of yourself.

Key realizations: I used food to manage emotions, I had internalized fatphobia that I'm still unpacking, my social identity was partly built around being "the big guy/girl," and learning to accept compliments is surprisingly hard when you've been invisible for years.

Physical transformation without emotional processing is unstable. Do both.

Adding the clinical framing, because it changes how the question reads.

Anxiety increase on mental health: counterintuitive, but losing weight rapidly triggered anxiety for me. Change — even positive change — is stressful. I was anxious about people treating me differently.

This is more common than people admit. A therapist who specializes in weight management has been invaluable. Don't neglect the mental health side of this journey.

newstart_MO said:

Anxiety increase on mental health: counterintuitive, but losing weight rapidly triggered anxiety for me.

Same experience, arrived at from the opposite direction. The detail I would add is minor and it is already implied above.

newstart_MO said:

Anxiety increase on mental health: counterintuitive, but losing weight rapidly triggered anxiety for me.

There is a second half to this that has not been said yet. The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either. Those three things can all be true at once, and most arguments here are two people holding different parts of that.

Moderator note: a couple of off-topic posts removed.