Enter the Body Positivity movement. Initially born out of fat acceptance and civil rights activism in the 1960s, Body Positivity has exploded into the mainstream, challenging the very definition of what a "healthy" body looks like.
The "Before" you was still worthy of hydration, nutrition, and rest. The "Now" you is not morally superior because you lost weight or gained muscle.
This is concern trolling. You do not owe anyone health. Health is not an obligation, nor is it a barometer of your value as a human being.