Both ascorbic acid and retinol are equally important skin care ingredients in their own right. It's just that each of them is suited differently for various skin types. Moreover, either plays a completely distinct role in improving one's complexion. Retinol, for instance, has remarkable exfoliation capabilities that come in handy if you're looking to minimize the accumulation of dead cells while ascorbic acid is a legendary brightener that works to reduce the visibility of hyperpigmented dark patches.