· Who.int. 2020. WHO | Micronutrient Deficiencies. [online] Available at: <https://www.who.int/nutrition/topics/vad/en/> [Accessed 12 March 2020].
· Oxford Handbook of Nutrition & Dietetics 2012
· British Nutrition Foundation, 2016. WHO Library Cataloguing-in-Publication Data,
· Vitamin and mineral requirements in human nutrition; 2nd Edit, WHO Library Cataloguing-in-Publication Data, Joint FAO/WHO Expert Consultation on Human Vitamin and Mineral Requirements 1998
· J, T., 2020. Does Vitamin C Deficiency Result In Impaired Brain Development In Infants? - Pubmed - NCBI. [online] Ncbi.nlm.nih.gov. Available at: <https://www.ncbi.nlm.nih.gov/pubmed/19161672> [Accessed 12 March 2020].
· Department of Health, Dietary Reference Values for Food Energy and Nutrients for the United Kingdom, HMSO, 1991. SACN Vitamin D and Health, 2016.
· Medicalnewstoday.com. 2020. Types Of B Vitamins: Functions, Sources, And Deficiencies. [online] Available at: <https://www.medicalnewstoday.com/articles/325292#thiamin> [Accessed 12 March 2020].
· Whitehead, R., 1991. Dietary Reference Values For Food Energy And Nutrients For The United Kingdom. 3rd ed. London: H.M.S.O.
· Assets.publishing.service.gov.uk. 2020. [online] Available at: <https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/537616/SACN_Vitamin_D_and_Health_report.pdf> [Accessed 12 March 2020].