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Effects of sunlight exposure and vitamin D supplementation on vitamin D levels in postmenopausal women in rural Thailand: A randomized controlled trial

Effects of sunlight exposure and vitamin D supplementation on vitamin D levels in postmenopausal women in rural Thailand: A randomized controlled trial

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
TCTR
Registry ID
TCTR20180223003
Enrollment
Unknown
Registered
2018-02-23
Start date
2017-06-19
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

postmenopausal women Postmenopausal women&#44

Interventions

Sunlight exposure is a natural way to increase one’s intake of vitamin D,Sunlight exposure is a natural way to increase one’s intake of vitamin D
sunlight exposure,sunlight exposure with vitamin D supplementation

Sponsors

FACULTY OF MEDICINE RESEARCH GRANT KHON KAEN UNIVERSITY
Lead Sponsor
FACULTY OF MEDICINE RESEARCH GRANT KHON KAEN UNIVERSITY
Collaborator

Eligibility

Sex/Gender
Female
Age
50 Years to 70 Years

Inclusion criteria

Inclusion criteria: Postmenopausal women aged between 50-70 years old from the Sam Liam area of Khon Kaen’s Muang district

Exclusion criteria

Exclusion criteria: - have thyroid, parathyroid, liver, or kidney disorders; - have previous histories of alcohol consumption, smoking, drug addiction, or substance abuse; - be allergic to vitamin D supplementation; have taken calcium or vitamin D supplements within the previous three months or osteoporosis medication (i.e., bisphosphonates, raloxifene, strontium ranelate, teriparatide, etc.) within the previous six months; - did not take these medicines that effect to 25(OH)D levels (i.e., anti-convulsant, anti-TB drugs especially rifampicin); - suffer from frailty; or be bed ridden

Design outcomes

Primary

MeasureTime frame
the effect of sunlight and sunlight with vitamin D on serum 25(OH)D 12 weeks serum 25(OH)D levels

Secondary

MeasureTime frame
the effect of sunlight and sunlight with vitamin D on serum PTH, Calcium, Phosphate 12 weeks serum PTH, Calcium, Phosphate levels

Countries

Thailand

Contacts

Public ContactWaranya Watcharanon

Khon Kaen University

ounin23@gmail.com+66810747876

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026