MaMa lotion is a blend of mandelic and malic acid, which are both Alpha Hydroxy Acids. This product has gotten fantastic reviews, and helps with discoloration like post-acne marks, melasma and sunspots. I personally saw a little improvement already after about 3 uses (I had a sample and then ordered the full size. You can´t get this in a store, but you can order it from various websites), but generally you see great results with prolonged use.
This is primarily a nighttime treatment, as AHAs can make your skin more sensitive to the sun. It´s recommended to apply this every other night. If your skin is a little sensitive you can still use MaMa lotion, but maybe start out with using it once or twice a week. You´ll see how your skin handles it, if it starts to flake and get dry you know you used it too frequently.
Pros:reduces skin discoloration better than any low percentage chemical peel I tried while being more gentle to the skin. Cons:price, pump dispenser gets sticky and clogged