Here are some signs that you have real hunger and good digestion:
There has been a complete bowel movement today
The body feels light, energetic, and ready to work after eating
The mind is clear, alert, and attentive, even after eating
The tongue is clean (like a smooth rose petal)
There are salivary secretions with fragrance in the mouth
The previous meal has been fully digested
When hungry: the stomach is grouchy and feels light
There is no odor if the person burps
There is no desire to overeat; when optimally full, hunger is easily satisfied
Vasant Lad – courtesy The Ayurvedic Institute