"Deliciously healthy" says that the products are good for your health but in a manner that tastes good. I don't see any difference between that and "delicious and healthy," which says that the products are good for your health and that they taste good. It is an advert, so someone must have thought it was catchy.
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deadratWhat would you think of "healthily delicious"?"healthily delicious'' sounds better to me. Thank you DR.