Topical Vitamin C is a great antioxidant to help protect the skin during the day (especially when paired with sunscreen) and an amazing brightening ingredient. In skincare hyaluronic acid acts as a humectant, allowing the skin to attract and retain water, keeping it hydrated. Especially during the winter, you can layer a hyaluronic acid serum over Vitamin C, under moisturizer during the day and after serum(s), just before your moisturizer in the evening.
Maelove Hydrator B5 Gel, $27.95
Lightweight gel that layers well and offers lasting hydration.
Maelove Glow Maker, $27.95
Lightweight 15% L-ascorbic acid serum with additional emollients and antioxidants. While often compared to the cult favorite SkinCeuticals C E Ferulic serum, this may be a close enough affordablish dupe for some skins.