NOTE: a promo code canNOT be added retroactively, meaning after you have made the order. Do not contact us to add the promo code after you have ordered.
Promo codes are locked to the book type for which they were created. It is not possible to use a promo code for a different book type. One example of a book type is the updated revision Stop the Thyroid Madness.
Promo codes are limited to product book type, not quantity of that type. A promo code is a fixed amount off of a book type. For example, if you order 3 copies of Hashimoto’s: Taming the Beast, you will get $2 off the group, not off of each book.
You can stack promo codes for orders containing multiple book types. If you order the updated revision Stop the Thyroid Madness and Hashimoto’s: Taming the Beast, you can add each promo code for each book type and save more!