Tocopherols in human milk: Change during lactation, stability during frozen storage, and impact of maternal diet. (September 2018)

• Record Type: Journal Article
• Authors: Wei, Wei; Yang, Jie; Xia, Yuan; Chang, Chang; Sun, Cong; Yu, Renqiang; Zhou, Qin; Qi, Ce; Jin, Qingzhe; Wang, Xingguo
• Is Part Of: International dairy journal. Volume 84(2018)
• Page Start: 1
• Page End: 5
• Publication Date: 2018-09
• Subjects: Dairying -- Periodicals; Industrie laitière -- Périodiques; Electronic journals; 338.1762142
• DOI: 10.1016/j.idairyj.2018.03.009
• Languages: English
• ISSNs: 0958-6946

Abstract

Abstract: Tocopherols in human milk samples collected from 103 healthy mothers from China were determined. Samples were obtained at 1–7 d, 8–14 d and after 15 d postpartum. The maternal dietary intake of 24 h dietary recall was collected. Four tocopherol isomers (α-, β-, γ-, and δ-tocopherol) were measured by HPLC. The total tocopherol concentrations significantly decreased from 7.5 ± 2.1 mg L −1 in colostrum to 3.8 ± 1.4 mg L −1 in transitional milk and 3.1 ± 1.4 mg L −1 in mature milk. The similar results were found for α- and γ-tocopherols. However, the content of β- and δ-tocopherols was almost constant. The four tocopherol isomers did not degrade during frozen storage (−20 °C and −80 °C) for 180 d. Total tocopherol content was significantly raised with the increase of fat intake in the maternal diet.