The Double-Deficient Older Inpatient: Vitamin D and Vitamin B12 Co-Deficiency Identifies the Greatest Cognitive and Affective Burden
Background/Objectives: Vitamin D and vitamin B12 deficiencies are both widespread among older adults, yet their combined status is rarely examined within the same cohort and whether the two exposures interact or simply accumulate remains unresolved. This study examined the association between combined vitamin D and B12...