Always ask your Pediatrician first. And since your son is just a newborn.
An infants digestive and internal organs are STILL developing as well, outside of the womb. So, for this reason, things can't just be given to the baby without knowing. If too much of something is given, it can overload the kidneys for example.
Baby formula, by law/ FDA regulations, HAS to contain Vitamin C. So don't worry. And, it has to be in the right proportions. Just look on the label of your baby formula. For a baby as well, it is VERY IMPORTANT that the formula is "iron" fortified...or a baby can get anemic.
Just ask your Pediatrician... since the days when we were children ourselves, many more advances and/or medical recommendations have changed.
This is an interesting article:
http://www.prcompass.com/Health/Moms_ndash_Your_Baby_Bott...
http://sids-network.org/experts/vitc.htm
All the best,
Susan