Big-appetite babies could become obese adults

Researchers from University College London studied 800 non-identical, same sex twin pairs and identified 228 pairs as “appetite discordant”, based on parent questionnaires during the first three months of life when the infants were exclusively milk-fed. 

The babies’ weight was recorded from birth up to 18 months.

They found that within the twin pairs the children who had higher “food responsiveness”, defined as eating in response to seeing or smelling food, and those with lower “satiety responsiveness”, defined as eating more before feeling full, grew faster than their siblings. 

Those with higher food responsiveness were 654g heavier than their siblings at six months and 991g heavier at 15 months. Weight differences between siblings with differing satiety were 637g at six months and 918g at 15 months. 

Since the study involved same sex twins, the researchers argued, differences in