Morning or afternoon vitamin D
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Summary
5 papers analyzed
These studies suggest that splitting vitamin D supplements into two doses 6 hours apart may be more effective than a single morning dose.
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Introduction
The timing of vitamin D supplementation, whether taken in the morning or afternoon, can influence its effectiveness and impact on health outcomes. This synthesis examines the optimal timing for vitamin D intake based on various research studies.
Key Insights
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Prolonged Decrease in Parathyroid Hormone (PTH) Levels:
- Taking vitamin D in two doses, 6 hours apart, results in a more prolonged decrease in serum PTH levels compared to a single morning dose .
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Sunlight Exposure and Vitamin D Levels:
- Afternoon sunlight exposure (10 am - 3 pm) is more effective in increasing vitamin D levels in infants compared to morning exposure.
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General Recommendations for Sun Exposure:
- For maintaining adequate vitamin D levels, moderate sun exposure in the mid-morning or mid-afternoon is recommended, with specific durations varying by season and latitude.
Conclusion
The research suggests that splitting vitamin D supplementation into two doses throughout the day may be more effective in maintaining lower PTH levels than a single morning dose. Additionally, afternoon sunlight exposure is more beneficial for increasing vitamin D levels compared to morning exposure. These findings highlight the importance of considering the timing of both supplementation and natural sunlight exposure to optimize vitamin D status.
Sources and full results
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