CARLTON player Elijah Hollands has been admitted to hospital four days after he had what his club described as "a mental health episode" against Collingwood.

The Blues had been investigating the circumstances surrounding Hollands' behaviour at the MCG on Thursday night.

On Monday night, Carlton released a statement confirming Hollands was in hospital.

"The Carlton Football Club can confirm that Elijah Hollands has been admitted to hospital this evening," the Blues said in a statement.

"While the club acknowledges the public’s interest, it again asks that the privacy of Elijah and his family be respected.

"This request for privacy extends to the media to please not report or speculate on Hollands' location and private health information."

Carlton had already ruled Hollands out of travelling to Perth for Saturday night's match against Fremantle.

On Sunday, Carlton chief executive Graham Wright was unable to confirm when Blues staff realised Hollands was unwell during the Collingwood match.

The AFL had asked the Blues for a report on what happened during the game.

Last year, Hollands twice took personal leave from Carlton, later revealing he had been battling mental ill-health and issues with alcohol.

The former Gold Coast player, who turns 24 on Saturday, was delisted by the Blues at the end of last season, despite having a year to run on his contract.

But Hollands was invited to Carlton training over summer, impressing enough to win his spot back on the list.

He has played all six games this season, averaging 18.4 possessions before the Magpies game.

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