Kiehl's Clearly Corrective Dark Spot Serum, Brightening Facial Serum, Reduces Hyperpigmentation & Post-acne Marks, with Vitamin C & Salicylic Acid, All Skin Types, Paraben-free - 1 fl oz

There is a black residue inside the cap, and I also noticed some floating black particles in the liquid. It looks contaminated.

I have not seen any results on the dark spots.

this is my favorite dark spot corrector! i’ve been using it for about 3 years on and off. it always does its thing especially when you’re consistent

I wasn’t sure this would work but I’ve had pretty drastic improvement. I’ve been using it for about 2 months. I feel more comfortable going makeup free now.

I'm almost through the bottle and have definitely noticed my dark spots getting lighter.