Does Vitamin C Inhibit Melanin Production?

Your Open Question Show me another Skin care questions. dematologist please ?_ch...I'm darkskinned and I'm using this product called crustie to brighten and whiten skin. Ingredients: almond shell granules, apricot (for vitamin c), micro elements selenium and zinc.. My question is I heared vitamin c inhibits the production of melanin. And melanin protects you from uv rays or something. Vitamin c as we know is very important in the body so are these two facts not contradicting itself? If this product I'm using (facial scrub) helps in inhibiting melanin poductiin and making me lighter would I be in danger of ub rays? And does the inhibiting of the production of melanin in our body affect the pigmentation of your unborn children like them becoming albinos?
I'm 17