Brightening Boost Vitamin C Power Serum

What you are looking at is Brightening Boost Vitamin C Power Serum by Exponent, a skincare product. Active ingredients can be effective and irritating at the same time, which is why the usual advice is to introduce one at a time. Patch test on the inner arm or along the jaw first, especially if you are already using retinoids, acids or vitamin C. Discounted listings come and go, and rarely at the same shop twice. Keep the lid closed and the pack out of direct sun — light and air degrade most actives faster than time does. The cheapest listing is not automatically the best deal: delivery and any code applied at checkout decide that.