Used in combination with powdered activated charcoal and toothpaste. But from what I've read, you don't want to put charcoal on a good toothbrush (like my Sonicare). That's why I ordered these. And I can't tell if they matter or not (regarding the lightening). I can say that I received 6 toothbrushes for a very good price. And they will mask the black spots.
π Set of 4 Philips Sonicare HX6064/10 Best White W2 Brush Heads with BrushSync for Effective Teeth Whitening
61 Review
Electric toothbrush Oral-B Kids Mickey Mouse, blue-yellow
66 Review
Oral-B Pro 570 CrossAction, white-blue
84 Review
πͺ White Oral-B Vitality Electric Toothbrush with FlossAction for Improved Oral Health
125 Review
Breath Me TM 50pcs Black Fiber Reed Diffuser Refill Sticks 12 inch - Elegant Home Fragrance Replacement
11 Review
BLIS Fresh Breath Kit: Potent BLIS K12 Oral Probiotic for Bad Breath & Halitosis Treatment - Clinically Proven Mouthwash, Tongue Scraper, Lozenges - 4 Week Supply
11 Review
The Legend of Zelda: Breath of the Wild game for Nintendo Switch, cartridge
20 Review
π TheraBreath Fresh Breath Chewing Gum: ZINC with Citrus Mint Flavor - Pack of 6 (10 Count)
11 Review