It's too bad that healthy weight does NOT equal healthy body. My sister is underweight most of the time (has been all of her life), but she smokes, used to drink heavily, and I can guarantee you (barring some freak accident) has no chance of living as long as I do. She is much more toxic than I will ever be! And all kinds of diseases await her in the future.
Your husband needs this cleanse more than you, dear, simply because of the amount of toxins going into his body on a daily basis. However, I realize that one can only work on themselves, so Kudos for you doing something so very good for you! I hope and pray that your husband will come to his senses and soon.