Related Experiment Video
Updated: Jan 21, 2026

Dietary Supplementation of Polyunsaturated Fatty Acids in Caenorhabditis elegans
Published on: November 29, 2013
[Vitamin D Supplementation in Older Adults: is the Hype Definitely Over?]
1Departement für Geriatrie und Altersforschung, Universitätsspital Zürich.
Abstract:
Four meta-analyzes on the effect of vitamin D on fracture prevention were published between 2016 and 2018. Two of these meta-analyzes focused on the primary prevention of fractures in adults aged 50 and over who were not at risk for fractures or vitamin D deficiency. Another meta-analysis focused on the combination of vitamin D plus calcium and the most recently published meta-analysis focused on the individual effect of vitamin D without calcium. In terms of current guidelines, it is important to note that only 1 out of the 3 most recent meta-analyzes were predominantly directed at adults over the age of 65 with an increased risk of falls, fractures, and vitamin D deficiency.What can we recommend now? Based on our critical review of the meta-analyzes on vitamin D and fracture prevention, vitamin D supplementation with or without calcium is still useful in older adults, ages 65 and older, with an increased risk of vitamin D deficiency and an increased risk of fracture.
More Related Videos
Related Concept Videos
Vitamins
Mineral, Vitamin and Water Absorption
Role of Skin in Vitamin D Synthesis
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin...
Role of Vitamins in Maintaining Bone Health
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Adult Stem Cells

