Alphabet's (GOOGL) YouTube said Wednesday it will use machine learning to estimate the age of users to provide age-appropriate content and enable safeguards and protections for non-adult users.

The initial roll-out will begin for a small set of users in the US, before a wider expansion.

YouTube said it will use artificial intelligence to help determine if the user is over the age of 18. Factors like the types of videos a user is searching for, the categories of videos they have watched, and the longevity of the account will be taken into consideration, it said.

If the system determines the user is under the age of 18, several safeguards and protections will be applied, YouTube said.

YouTube said it has used the age estimation approach to provide age-appropriate content in markets outside the US for 'some time'.

"We are now bringing it to the US, and as we make progress we'll roll it out in other markets," YouTube said in a statement.