Can omega 3, b complex vitamins and collagen supplements after the absorbition of iron? i have just received an iron drip for anemia and be placed on iron supplements and yet i am taking the above listed supplements. is it safe to take all at once?

There is no interaction with those supplements. Neither one of them affects the absorption of iron.

You may take these medications without concern for interference from one with the other. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs.