Vitamin C for a 13 Month Old

Just wondering if it is safe to give a 13 month old vitamin c supplements? - My DD has a terrible cold and even though i have been giving her fresh fruits (oranges, kiwi fruits etc) that are high in V C they don't seem to be helping and are making her poos quite acidy which in turn is leading to a very red and sore bottom :(

Any advice greatly appreciated!

I used to give Charlotte Pentavite - it is a vitamin supplement liquid designed specially for bubs. Helped a bunch.
By the time she was 14 months old though we would give her a chewable vit c, half at a time. She loved it, still does :)

Hope bubs is on the mend very soon. Don't forget the vicks on the soles of her feet - works wonder ;)

Thanks LS :) - I've heard a bit about Pentavite so might give that a try.

Wow, thanks for the tip about the feet, i had no idea!!