Will the BURST floss interfere with my birth control? Megan B December 30, 2020 22:32 Updated No, charcoal has been known only to interfere with birth control if ingested. Related articles Does the BURST floss container come in Rose Gold or White? Why does the BURST floss expand and how? How much BURST floss is on the bobbin and how long should it last? Is the charcoal in the bristles of the BURST brush bad for my enamel? Are the BURST Whitening Strips safe for weak enamel?