Scientists are studying Estonians' genes.
They found genes that affect body weight.
These genes may cause people to eat more.
Genes work in the brain.
Genes and environment influence body weight.
When food is abundant, genes may cause rapid weight gain.
Genes have a stronger effect on young people.
Many genes affect brain function.
These genes influence hunger and satiety.
In some Estonians, these genes don't work properly.
They don't feel full.
Estonia has more of these genes.
Some Estonians gain weight more easily.
Genes cannot be changed.
We can learn how they work.
This helps find solutions for weight control.
Food, exercise and sleep are important.
We can still make choices that help us stay healthy.
We now understand why weight control is harder for some.