What is the Shelf Life of EHT? Joel B December 11, 2015 16:14 Updated Follow EHT Age-Defying Supplement has a shelf life of 2 years. Related articles How Do I Store EHT? How Do I Know EHT is Working? How Old Do You Need to Be to Take EHT Age-Defying Supplement? Does EHT Contain Any Allergens? Is EHT Safe? Comments 0 comments Article is closed for comments.