will these things interfere?

I'm doing transdermal magnesium therapy----foot soaks at night. Right after that, is when I take my mms. Will the magnesium interfere with the mms?

Also, I brush my teeth right before I take the mms with Dr. Christophers herbal tooth formula, which has a blend of these herbs: horsetail grass, peppermint leaf, white oak bark, cloves, prickly ash bark, bayberry bark, slippery elm bark, stevia herb.
Is that okay. Thanks!