How long does it take for baking soda to remove acne scars and dark spots?

forever, dont believe that crap. the only thing its good for is an antibacterial. wash your face and teeth with it. but scars and dark marks? nope. i have suffered with those, and acne since 8th grade. i am almost 20. theyre finally going away. i would recommend essential oils like tea tree, ROSEHIP, almond, primrose, peppermint, lavender, grapeseed). just do your research on which oils are best for which problem. you could also rub a potato and lemon juice on your face, or make a mask, theyre natural skin lighteners and wont make you break out. leave on for 20 mins then wash off.