There is currently no evidence that herbal treatments can effectively treat any form of cancer. You should, however, make sure his diet is as full of organic, whole foods and he eats a lot of fresh fruits and vegetables. This will not necessarily directly affect your husband's cancer, but it will help keep him as healthy and energized as possible while going through chemotherapy. You can help him with any nausea connected to his treatment — ginger tea has been shown to be very effective for nausea after chemo treatments.