Could you tell me is it safe for my husband to use a magnesium spray to help his restless legs, with everything else going on with his cancer he's finding it hard to sleep and the rls is not letting him sleep. The reason I ask is that he's having treatment and don't want to unbalance any minerals or anything else as I've heard it will absorb some and affect kidney function, he has liver cancer by the way. Thank you so much in advance
