Porter, K, Ward, M, Hughes, C, O’Kane, M, Hoey, L, McCann, A, Molloy, AM, Cunningham, C, Casey, M, Tracey, F, Strain, S, McCarroll, K, Laird, E, Gallagher, AM & McNulty, H. 2019 Hyperglycemia and metformin use are associated with B-vitamin deficiency and cognitive dysfunction in older adults. The Journal of Clinical Endocrinology & Metabolism, vol. 104, no. 10, pp. 4837-4847. https://doi.org/10.1210/jc.2018-01791