Websites that sell MMS supplements include MMS Products International and Miracle Mineral Supplement. The Miracle Mineral Supplement is not approved or endorsed by the U.S. Food and Drug Administration, so the safety and benefits of this product are unproven, notes the FDA's website.
MMS supplements cannot be sold in some countries due to being unregulated and untested by organizations. Prices and shipping times can vary depending on what site a customer orders the supplements from. Each website also has its own return guidelines and refund policies. It is a good idea to review these before deciding which site to order from in case a customer wants to return the product; MMS Products International, for instance, does not offer refunds, as noted on the organization's website.