I'm still trying to find the right amount to use and the best way to apply it. I've tried just the drops, but find it hard to spread around my face and it definitely leaves an odor this way. I've tried it in my moisturizer, which helps cut the odor and helps evenly spread the product, but it takes at least 8 drops to show any amount of color. I have a light skin tone, so I feel like this amount is excessive and not cost effective for the results it provides.