Is it safe and beneficial to take 1 daily tablet of multivitamin (containing royal jelly, ginseng, vitamins b,ce & k in addition to magnesium, iron, zinc , selenium, copper and iodine) for a healthy adult my age?

Controversial: Not clear that one requires a menu of supplements if consuming a standard balanced American diet. This is so contentious that it is possible to find a plethora of opinions online, and hard to say how to proceed. Your multivitamin may or may not be safe, and may not even contain listed amounts of supplements. A good source is "Consumer's Reports" where this has been studied.