Did you know that Calamansi (Lime) makes your skin whiter? I do use calamansi too for my knees,elbows, and armpit. And it's effective. My skin whiter and smooth. It serves as a toner for me, but it makes your skin sensitive to sunlight. You will get even darker skin if you are expose to sunlight while using calamansi for your skin. I don't use whitening soaps now, and I guess calamansi is enough to make your skin look better than using whitening soap. I am proud that we have it here in our country. Very effective and no side effects. I have to say it coz my mom used to rub calamansi on my skin when I was younger. And now i'm using it and i want to share my experience to you guys. And i hope it will help.