La maigreur constitutionnelle

Rare males or females called constitutional thinness displayed a low BMI, independently of infectious, neoplastic diseases or psychiatric disorders. Fat mass and fat free mass including bone mass are decreased without any common biological abnormalities. Appetite regulating hormone PYY is elevated leading to shorter meals and increasing frequency of snacking. A genetic approach would be able to explain this weight gain resistance. Medical and general population should be more informed about this status.