Review title is No huge difference and possibly not safe on enamel [SEP] Picture is the before & after: 3 uses. No difference whatsoever, except in the second photo the charcoal stained my Invisalign attachments and went in between my gums and teeth. The toothbrush was a 10/10 soft bristles and gentle on the gums, tounge cleaner 8/10. The charcoal powder itself was a 4/10. No flavor, extremely messy, also keep in mind this is not meant for daily use and you need to be extremely gentle and careful when using this. Think of sandpaper on your teeth, that’s essentially what this could do. Enamel doesn’t grow back so use this with caution. I personally was just curios to see if it would work and it did not work for me so I will discontinue use. I will whiten my teeth with a product that is safe and FDA approved.