Vitamin D nutritional policy needs a vision for the future.

Area of Science:

• Endocrinology and Nutrition
• Molecular Biology
• Public Health

Background:

• Vitamin D is historically recognized for its essential role in bone health, preventing rickets and osteomalacia.
• Current Reference Daily Intake (RDI) guidelines may be insufficient, with approximately half of elderly populations in North America and Western Europe experiencing vitamin D deficiency.
• Recent research has elucidated vitamin D's broader biological functions beyond bone metabolism.

Purpose of the Study:

• To review the expanding understanding of vitamin D's physiological actions.
• To highlight the impact of vitamin D on multiple organ systems.
• To advocate for revised global vitamin D nutritional policies.

Main Methods:

• Literature review of vitamin D's biological actions.
• Analysis of current vitamin D deficiency prevalence.
• Examination of vitamin D's role in various physiological systems.

Main Results:

• Vitamin D, via its active metabolite 1alpha,25-dihydroxyvitamin D(3) [1alpha,25(OH)(2)D(3)] and the vitamin D receptor (VDR), influences immune, metabolic, cardiovascular, muscular, and brain systems.
• Evidence suggests VDR-mediated actions of 1alpha,25(OH)(2)D(3) contribute to favorable health outcomes, including cancer prevention.
• Current RDI guidelines do not fully encompass vitamin D's diverse health benefits.

Conclusions:

• Global vitamin D nutritional guidelines require updating to reflect current scientific knowledge on its wide-ranging effects.
• Implementing revised policies for vitamin D intake can reduce disease frequency, enhance quality of life, and lower healthcare costs.
• A shift in policy is needed to maximize vitamin D's contribution to public health.