There have been a few black products promising to make teeth whiter around lately, and here's another one, a whitening mouthwash from Diamond Whites.
Combining steam-distilled organic coconut oil and peppermint essential oil with a spot of activated charcoal from coconut shell, Black Edition Teeth Whitening Liquid (£9.99) uses the Indian Ayurvedic oil pulling method to remove bacteria hiding under crevices in the gums, pores and tubules. Nice.
After ten or 15 minutes of swishing the solution around the mouth, it should turn a milky white, having sucked out harmful bacteria. The coconut shell is also mildly abrasive to gently whiten teeth, says Diamond Whites.