Thank you for your comments Goldfinch. It is uncertain how the bod pod treats water in the body, it could be that part of the decreased lean mass is no more than my retaining less water yesterday morning than the day I had the first test...

That being said, I did break down and purchase a food scale. I am pretty good at judging portion sizes by sight, but it could be that I've not been eating as much as I thought.

Anyway, I appreciate the patience and advice. Being able to come here and talk it out means I don't get so obsessive over it - amazing how that works.