Sefton Central Labour MP Bill Esterson welcomed moves by Sefton Council to ban takeaways from opening near schools.
Sefton is considering banning fast food restaurants from opening within 400 metres from parks, schools or colleges in an attempt to tackle the growing childhood obesity problem.
Bill backed the plans which he said was a common sense approach to help children lead a healthier lifestyle.
Bill said: "We have a growing problem of childhood obesity in this country. We have a problem right here in Sefton.
"Sefton Council should be applauded for taking a proactive approach to tackle the problem.
"If children have spare money in their pockets they will want to spend it. If the first place they see when they get out of school is a fast food restaurant, that will be where they spend it.
"We need to promote healthier diets and lifestyle for children. This measure is an excellent way of doing that."
Bill said obesity is an issue that needs to be tackled across the country.
Bill said: "Some people obviously complain about the 'nanny state', but obesity is a problem that is costing the NHS £5bn every year.
"It is an issue that can no longer be ignored.
"Here in Sefton we have seen the installation of excellent new outdoor gyms which are designed to get more people in the borough active and out in the great outdoors.
"The new gyms, with the proposed exclusion zone for takeaways are a part of a co-ordinated approach to take real steps to resolve the obesity problem.
"That is why I fully support Sefton's approach."