The B Vitamins in Honey

CHAPTER 13. Assay of B Vitamins and other Water-soluble Vitamins in Honey

“…Whereas previous studies found very low amounts of riboflavin in honey samples-between 0.005 and 1.45 mg/kg (Bogdanov et al 2008;Haydak et al 1942;Kitzes et al 1943;Vin˜as et al 2004a), very recent results (Ciulu et al 2011) provide evidence that this vitamin can also reach higher concentrations (i.e. close to 10 mg/kg).…”

“…between 40 and 940 mg/kg. However, only one year later Kitzes et al (1943) measured concentrations that were two orders of magnitude lower, i.e. between 0.63 and 5.9 mg/kg.…”

“…Only traces of thiamine can be found in honey: its concentration rarely exceeds 0.1 mg/kg (Bogdanov et al 2008;Haydak et al 1942;Kitzes et al 1943). Although thiamine is very unstable in aqueous solutions, it appears to be stable in honey.…”

High Ascorbic Acid Content in Some Iranian Honeys

“…High values for ascorbic acid have been reported in honeys where Labiacea, especially mint and thyme, are the dominating flowers [6], However, because of the interferring substances, the high amounts reported could be doubted [2J. The 2,4 dinitrophenyl hydrazine method is more specific than those which employ red-ox dyes.…”

The Influence of Diet on Iron Absorption

“…Serum iron was determined by the method of Kitzes, Elvehjem, and Schuette (24). The iron-building capacity of the serum was measured colorimetrically according to a method which utilizes the production of a red pigment by the union of the Bt-globulin with iron (25) Hemoglobin was determined as oxyhemoglobin using an Evelyn colorimeter (26).…”