Bentonite clay can safely be used while pregnant and nursing. You can use it internally as it doesn’t stir-up toxins, but rather pulls and absorbs them, therefore, allowing you to safely heavy metal detox without harming your baby. That being said, I would be sure you choose a reputable source like
Bulk Herb Store to purchase a high quality clay from.
While I haven’t come across any reason why someone with SLE couldn’t use bentonite clay, I would suggest working with a naturopathic doctor to monitor any unpleasant responses just in case.