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CompletedNCT03478475Updated Mar 29, 2018

Vitamin D Supplementation and and Glycemic Indexes

An interventional study of cholecalciferol (Euro-Pharm International, Canada) and Placebo in Deficiency, Vitamin D and Insulin Resistance, sponsored by Université d'Auvergne. Completed. Open to participants aged 65 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-03-29.

Sponsored by Université d'Auvergne · Not applicable, Interventional, and Prevention

From the registry’s dates

  • Registered 2 years 8 months after the study started (first participant enrolled Jul 2015, registered Mar 2018).
Phase
Not applicable
Study type
Interventional
Enrollment
115
Allocation
Randomized
Ages
65 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 228 studies testing cholecalciferol in Vitamin D Deficiency — 9 open to participants now, 16 under way, 2 of them phase 3. Cholecalciferol · Vitamin D Deficiency.

Enrollment
76th of 228
115 · median 72
Started
2015
with 19 others
No phase
113 of 228
6 open now
Registered
165th of 228
by date

Among the 228 studies testing cholecalciferol in Vitamin D Deficiency, this one is the 76th largest by enrollment, is one of 20 that started in 2015, is one of 113 with no phase, and was the 165th registered.

Vitamin D Deficiency

801 studies on the registry are indexed under Vitamin D Deficiency; 60 are open to participants now.

Browse Vitamin D Deficiency studies →

Open to participants now

9 of the 228 studies testing cholecalciferol in Vitamin D Deficiency are open now, in 7 countries. Recruiting first, the newest first:

4 more — sign in →

By country, each count listing its studies:

All 9 open studies →

About cholecalciferol

Cholecalciferol: first FDA approval 2000 (INFUVITE ADULT), first EMA approval 2005. What it is approved for, and how studies give it, is on its page →

Who these studies take

Of the 37 Vitamin D Deficiency studies recruiting now, 16 (43%) set no upper age limit and 18 (49%) stop at 75 or younger; 10 take children under 18; 11 take healthy volunteers.

This study: 65 Years and older · all sexes · healthy volunteers too.

The full table on the hub →

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 228 studies testing cholecalciferol in Vitamin D Deficiency, or all of them as a file.
02

Study summary

Age affect insulin sensitivity and the metabolism, and vitamin D status was shown to have a correlation with markers of insulin resistance. That's why, we aimed in our trial to study the effect of vitamin D supplementation on glycemic markers and index of insulin resistance.

Read the detailed description

A low serum 25-hydroxyvitamin D [(25(OH) D)] concentration was shown to correlate with higher fasting blood glucose (FBG) and insulin levels. Since age affect insulin sensitivity and the metabolism, we aimed in this randomized controlled trial to investigate the effect of vitamin D supplementation on glucose homeostasis and index of insulin resistance in elderly subjects living in Beirut, Lebanon.

Participants (n= 115) deficient in vitamin D were randomly divided into two groups, a group receiving 30,000 IU cholecalciferol/week for a period of 6 months, and a placebo group. The index of insulin resistance HOMA (homeostasis model assessment) was the primary outcome. Glucose homeostasis and metabolic markers were also measured at start of treatment and at 6 months.

03

Conditions studied

  • Deficiency, Vitamin D
  • Insulin Resistance

Keywords

  • Vitamin D
  • HOMA-IR
  • Glucose
  • HbA1C
  • insulin resistance
04

Who can participate

Ages eligible
65 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

-Deficiency in vitamin D and having no medical history of type 2 diabetes mellitus

Exclusion criteria

Exclusion Criteria:

patients with a history of type-2-diabetes, congestive heart failure, liver failure, renal failure, cancer, or taking oral hypoglycemic drugs or statin therapy, or patients having metabolic bone disease.

05

Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
115 participants (actual)

Study arms

  • Experimental
    Vitamin D group

    The vitamin D group received three times per week a supplement of 10,000 IU cholecalciferol (Euro-Pharm International, Canada)

    Dietary Supplement: cholecalciferol (Euro-Pharm International, Canada)

  • Placebo comparator
    Placebo group

    The placebo group received three times per week a tablet containing microcrystalline cellulose (66.3%), starch (33.2%), and magnesium stearate (0.5%), per serving.

    Other: Placebo

Interventions

06

What researchers measure

Primary outcomes

  1. HOMA-IR

    The HOMA-IR formula was as following: HOMA-IR = \[insulin (mU/L) × glucose (mg/dL)\]/22.5 where IR is the mutual of percentage sensitivity with a normal value of 1.0.

    Time frame: 6 months

  2. 25 (OH)D

    Vitamin D

    Time frame: 6 months

Secondary outcomes

  1. BMI

    Body mass Index

    Time frame: 6 months

  2. FBG

    Fasting blood glucose

    Time frame: 6 months

  3. FBI

    Fasting Blood inslin

    Time frame: 6 months

  4. HbA1C

    Glycated hemoglobin

    Time frame: 6 months

  5. Total cholesterol

    Total cholesterol

    Time frame: 6 months

  6. LDL cholesterol

    LDL cholesterol

    Time frame: 6 months

  7. HDL cholesterol

    HDL cholesterol

    Time frame: 6 months

07

Study locations

No study locations are listed for this record.

08

References and documents

Publications

  • El Hajj C, Chardigny JM, Boirie Y, Yammine K, Helou M, Walrand S. Effect of Vitamin D Treatment on Glucose Homeostasis and Metabolism in Lebanese Older Adults: A Randomized Controlled Trial. J Nutr Health Aging. 2018;22(9):1128-1132. doi: 10.1007/s12603-018-1083-8. PubMed 30379314 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Jul 2015 to primary completion in Sep 2015, 2 months.

Of 168 non-industry interventional studies with no phase under Vitamin D Deficiency, half reached primary completion within 11 months of starting (the median), counting those still running; a quarter within 4 and three quarters within 29. This study's 2 months is below that.

Counting every sponsor, half of 170 studies reached it within 11 months; a quarter within 4 and three quarters within 29.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 13, 2018
First posted
Mar 27, 2018
StartActual
Jul 2, 2015
Primary completionActual
Sep 19, 2015
CompletionActual
Sep 19, 2015
Last update
Mar 29, 2018
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 29, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03478475
Lead sponsor
Université d'Auvergne
Responsible party
Sponsor
First posted
Mar 27, 2018
Start date
Jul 2, 2015
Primary completion
Sep 19, 2015
Completion
Sep 19, 2015
Last update
Mar 29, 2018

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2018. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drug tested here: Cholecalciferol

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