References:
1. NHS – Vitamin B12 and Folate Deficiency
2. Harvard Health – Vitamin B12 Deficiency Can Be Sneaky and Harmful
3. Viva! – The Truth About B12 and Vegan Diets
4. Holick MF. (2004). Sunlight and vitamin D for bone health and prevention of autoimmune diseases, cancers, and cardiovascular disease. Am J Clin Nutr, 80(6 Suppl):1678S–1688S.
5. Allen LH. Causes of vitamin B12 and folate deficiency. Food Nutr Bull. 2008;29(2 Suppl):S20-34.
6. Tucker KL et al. Vitamin B12 status and intake among older adults: Framingham Offspring Study. Am J Clin Nutr. 2000;71(2):514–522.
7. Holick MF. Vitamin D deficiency. N Engl J Med. 2007;357(3):266–281.
7. Nair R, Maseeh A. Vitamin D: The “sunshine” vitamin. J Pharmacol Pharmacother. 2012;3(2):118–126
8. B vitamins and mood improvement – Kennedy, Nutrients, 2016
9. Vitamin D and immune modulation – Aranow, Journal of Investigative Medicine, 2011
10. B12 and energy metabolism – NHS, Vitamin B12 Deficiency Guide, 2023
11. B12 and nervous system support – Moore et al., British Journal of Nutrition, 2012
12. Vitamin D and neuromuscular function – Ceglia, Current Opinion in Clinical Nutrition, 2009
13. Vitamin D and mood regulation – Cheng et al., Nutrients, 2020
14. Vitamin D and adaptive immunity – Baeke et al., Frontiers in Immunology, 2010
15. B12 and fatigue recovery – Sanz-Cuesta et al., BMJ Case Reports, 2013
16. Vitamin D and inflammation – Berridge, Physiological Reviews, 2017
17. B vitamins and sustained energy/mood – Kennedy, Nutrients, 2016
18. Vitamin D and respiratory infections – Martineau et al., BMJ, 2017
19. Vitamin D and biological aging – Chen et al., Frontiers in Aging, 2021
20. B12 and long-term brain health – O'Leary & Samman, Nutrients, 2010.