Abstract: A method of producing 1,4-dihydronicotinamide riboside (NRH) is disclosed. The method comprises providing nicotinamide riboside chloride (NRCl) in a liquid solution; adding a metal dithionite into the liquid solution under a first temperature; and reacting the metal dithionite with the nicotinamide riboside chloride (NRCl) in the liquid solution under a second temperature to form a mixture, wherein at least a portion of the mixture comprises the 1,4-dihydronicotinamide riboside (NRH).

Abstract: Consumable (edible) iron-containing compositions containing precisely or at least the following components: (i) an edible oil; (ii) ionic iron, typically as an iron salt or iron complex; and (iii) an esterified derivative of a natural product, such as an esterified version of curcumin, catechin, or ascorbic acid. Methods for preparing these compositions are also disclosed. Food products containing these compositions are also disclosed. Also disclosed herein are methods for treating a subject having an iron deficiency by administering the iron-containing composition to the subject.