ProThera Klaire Labs Ester-C - 500 Milligrams Buffered Vitamin C Designed to Be Ester-C is a buffered, non-acidic form of vitamin C that is gentle on the stomach.* Created by a unique process resulting in a patented mixture of mineral ascorbates and vitamin C metabolites. May be more comfortably digested by those who have difficulty tolerating regular vitamin C.* Hypoallergenic* product free of the following common allergens: milk/ casein, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, and soybeans. Contains no artificial colors, flavors, or preservatives. Trusted by healthcare practitioners since 1969, products are developed closely with physicians and are intended to be used as directed by a healthcare practitioner. A non-acidic form of vitamin C that is gentle on the stomach. Created by a unique process resulting in a patented mixture of mineral ascorbates and vitamin C metabolites. Ester-C® can be taken by anyone who wishes to increase their intake of vitamin C. This non-acidic form may be more comfortably digested by those who have difficulty tolerating regular vitamin C.* Payment DetailsWe currently accept payment via PayPal only. Once payment is cleared, we will dispatch your shipment within 1-3 business days. Please refer to the "Shipping" tab for more information regarding shipping speed to your destination.Return PolicyAs our valued customer, we will do our best to make sure the product you receive arrives to you on time and as expected. If you are not satisfied with your purchase, please contact us within 30 days of receiving your order to process a return.