word choice - "eat healthy" or "eat healthily"



Look at the following sentence.



In order to keep fit, we must eat healthy food.



Can we also say "eat healthy" and "eat healthily" to mean eat healthy food ?



In order to keep fit, we must eat healthy.


In order to keep fit, we must eat healthily.



Are they both correct or is either of them wrong?


Thanks for Kate Bunting's comment.


I am asking this because I know "go to bed hungry" makes sense and is quite different from "go to bed hungrily"


Does "eat healthy" also make sense?




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