Vitamin Supplementation for the Geriatric Population

Core Vitamin Recommendations

The American Geriatrics Society recommends that all elderly individuals aged 65 years and older should receive daily supplementation with 800-1000 IU of vitamin D and 1000-1200 mg of calcium, as this combination reduces hip fractures by 18-30% and falls by 19% 1, 2
Elderly individuals should receive 4-8.6 μg/day of vitamin B12, significantly higher than the outdated UK RNI of 1.5 μg/day, to normalize functional markers 3
Elderly individuals should receive 1.9-4.9 mg/day of vitamin B6, substantially higher than current recommendations, to avoid low plasma PLP and hyperhomocysteinemia 4, 5
Include folate supplementation as part of B-vitamin complex, particularly for those with cardiovascular risk factors, due to functional interdependence with B12 4, 6

Prescribe to all patients ≥65 years: Vitamin D3 (cholecalciferol): 800-1000 IU daily, Calcium: 1000-1200 mg daily in divided doses, and Vitamin B12: 4-6 μg daily (or fortified cereals) 2, 3
Check 25(OH)D levels in institutionalized elderly, dark-skinned or veiled individuals with limited sun exposure, and those with osteopenia/osteoporosis on DXA 1, 2
Check B12 levels (serum cobalamin, MMA, or holotranscobalamin) in those on chronic antacids or proton pump inhibitors, patients with unexplained anemia, neuropathy, or cognitive decline, and vegetarians/vegans 3, 6

Mandatory 800 IU/day vitamin D or equivalent intermittent dosing for institutionalized elderly 2
Higher prevalence of B-vitamin deficiencies (75% for B6) requires routine supplementation in institutionalized elderly 4
Consider comprehensive multivitamin due to poor dietary intake in institutionalized elderly 3

Upper safe limit for vitamin D is 2000-4000 IU daily 2
Calcium supplementation may modestly increase kidney stone risk (dietary calcium does not) 2
Monitor calcium and phosphorus levels every 3 months in those on high-dose supplementation 2
Vitamin D toxicity is rare but occurs with doses >50,000 IU daily producing levels >150 ng/mL 2