Calories In VItamins?!?!?!?

So I was taking my 2 daily Flax Seed Oil pills that I take everyday and happened to notice the nutitional facts on the bottle. There are 25 calories in each pill. Seriously? Calories in vitamins? I mean, am I just sheltered or did anyone else know this??!!?! I can only imagine how many calories were in those yummy Flintstone vitamins that my mama made me take as a kid! LOL