About half of adult Americans switch their religious affiliation at least once during their lives, often times among various Christian denominations.

That is one of the findings from a new study by the Pew Forum on Religion and Public Life.

One expert says the report shows how pervasive religion a la carte is in America.

People change faiths or abandon them completely for different reasons, including:

• They didn't believe their spiritual needs were being met.
• They liked another faith more.
• Or they changed their own religious or moral beliefs.

Most people decide on one religious viewpoint by the age of 36.