Biossance Squalane + 10% Vitamin C Dark Spot Serum This new Biossance Squalane + 10% Vitamin C Dark Spot Serum ($62) adds a white shiitake mushroom extract to potent vitamin C to target any already-visible hyperpigmentation, and help reduce future occurrences, too. Image Source: sephora.com Biossance Squalane + 10% Vitamin C Dark Spot Serum $62 from sephora.com Buy Now