is research out of US for med school - acceptable

I am planning for med school, but my parents do not live in the US so I got to a different country to visit them every break?
will my position at med school admission be hindered if all my research experience came from an international source ?

The research is ok, however, your chances to go to a US med school is very low unless you have a bank account of $250k usd or if you are an US citizen to start with.