This is pretty much what I do, as well!<p>I've found the equations for metabolism and weight to be accessible enough that I can just plug in daily calories and weight and get a nice prediction once you run it through a curve fit. Nothing too sophisticated required.<p><a href="https://jodavaho.io/tags/diet.html" rel="nofollow">https://jodavaho.io/tags/diet.html</a><p>That's not to say that ML doesn't help. I use LLMs for super simple calorie tracking.
ML and LLMs are complete overkill. You can do this with simple difference equations.<p>Anyway nowadays you can just use Macrofactor which makes it all easier (not just the calculations/predictions but the data input itself).