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Hi, thanks for reading my question.

We normally say "take care of yourself", but is that OK to say "take care yourself"?

Sometimes we say "you take care" without a "of".

Thanks
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We normally say "take care of yourself", Yes
but is that OK to say "take care yourself"? No

Sometimes we say "you take care" without a "of". Yes.

These are casual and idiomatic expressions.
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Thanks so much Clive!