CClinicalTrials.gg
CompletedNCT02466087Updated May 8, 2019Results posted

Role of Magnesium Supplementation in the Treatment of Depression

A Phase 2/3 interventional study of Mg Cl in Depression, sponsored by University of Vermont. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2019-05-08.

Sponsored by University of Vermont · Phase 2/3, Interventional, and Treatment

Phase
Phase 2/3
Study type
Interventional
Enrollment
126
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The objective of this project is to test the hypothesis that magnesium supplementation will decrease depressive symptoms in adults.

This study takes place over 12 consecutive weeks. While the investigators will follow the volunteers for the full 12 weeks volunteers will only take magnesium supplements for 6 consecutive weeks. Volunteers will be randomly assigned to start the supplement at week 1 or week 7. Volunteers will take two supplement two times a day for a total of 248 mg elemental magnesium daily in the form of magnesium chloride. This amount of magnesium is less than the tolerable upper limit of 350 mg per day. The supplements will be provided. Volunteers will be asked to maintain their normal diet for the 12 weeks of the study.

The primary outcome measure is the PHQ-9 questionnaire, a validated measure of depression. Secondary measures include the GAD-7 for Anxiety and side effects.

02

Conditions studied

03

In context

Depression

8,057 studies on the registry are indexed under Depression; 1,641 are open to participants now.

This study's enrollment of 126 is above the median of 84 across 6,720 interventional studies indexed under Depression.

Browse Depression studies →

Lead sponsor

University of Vermont is the lead sponsor of 215 studies on the registry; 28 are open to participants now.

Of its 16 completed or terminated interventional studies of FDA-regulated products, 9 (56%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • All adults at least 18 years of age
  • A Patient Health Questionnaire-9 (PHQ-9) score of greater or equal to 5 but less than 20
  • People who are currently being treated for depression are still eligible to participate but their treatment must be stable (no changes in medication dose or brand and/or no changes in therapy regimen for at least 2 months).

Exclusion criteria

Exclusion Criteria:

  • Active delirium or dementia
  • Medicinal treatment for bipolar disorder, personality disorder or schizophrenia,
  • Glomerular Filtration Rate of less than 60
  • Irritable Bowel Disease
  • Inflammatory Bowel Disease
  • GERD
  • Gastritis
  • Pregnant as reported by potential volunteer
  • Myasthenia Gravis
  • Planned elective surgery
  • Currently taking

    • Long Term Antibiotics
    • Fluoroquinolone
    • Trientine or Penicillamine
    • Long Term Antivirals
    • Digoxin
    • Bisphosphonates
    • Eltrombopag
    • Opiods
    • Calcium Channel Blockers
    • Deferiprone
    • Doxercalciferol
  • Unable or unwilling to stop taking a magnesium supplement
05

Study design

Phase
Phase 2 / Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
126 participants (actual)

Study arms

  • Experimental
    Mg Cl

    500mg Mg Cl per day for 6 weeks

    Drug: Mg Cl

  • No intervention
    Control

    No intervention

Interventions

  • DrugMg Cl

    Four supplements a day for 6 weeks.

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What researchers measure

Primary outcomes

  1. Patient Health Questionnaire-9

    Change in score from week 1 to week 6 and week 7 to week 12 (difference in differences) The Patient Health Questionnaire-9 Item is a validated questionnaire with high sensitivity and specificity for the diagnosis of depression. The PHQ-9 score can range from 0 to 27, with the following severity scores: 0-4 None; 5-9 Mild; 10-14 Moderate; 15-19 Moderate to Severe; 20-27 Severe.

    Time frame: 12 weeks

Secondary outcomes

  1. Generalized Anxiety Disorder 7 Item Questionnaire

    Change in score from week 1 to week 6 and week 7 to 12 (difference in differences) GAD-7 score has been shown to be a valid indication of anxiety symptoms. The GAD-7 score can range from 0 to 21, with the following severity scores: 0-4 None; 5-9 Mild; 10-14 Moderate; 15-21 Severe.

    Time frame: 12 weeks

  2. Change in Headaches While Taking Supplements

    Change in headaches compared to normal during the 6 weeks on supplements. Change was calculated from 2 time points-start of supplements and end of supplements. Change was recorded as 0, None (same) 1. Mild 2. Moderate 3. Severe (worse)

    Time frame: 12 weeks

07

Results

Posted May 8, 2019

Participant flow

First Intervention: Weeks 1-6
Participant flow — First Intervention: Weeks 1-6
MilestoneMg Cl (Weeks 1-6), Then no Intervention (Weeks 7-12)No Intervention (Weeks 1-6), Then MgCl (Weeks 7-12)
Started6264
Completed5557
Not completed77
Second Intervention: Weeks 7-12
Participant flow — Second Intervention: Weeks 7-12
MilestoneMg Cl (Weeks 1-6), Then no Intervention (Weeks 7-12)No Intervention (Weeks 1-6), Then MgCl (Weeks 7-12)
Started5557
Completed5557
Not completed00

Outcome measures

PrimaryPatient Health Questionnaire-9

Change in score from week 1 to week 6 and week 7 to week 12 (difference in differences) The Patient Health Questionnaire-9 Item is a validated questionnaire with high sensitivity and specificity for the diagnosis of depression. The PHQ-9 score can range from 0 to 27, with the following severity scores: 0-4 None; 5-9 Mild; 10-14 Moderate; 15-19 Moderate to Severe; 20-27 Severe.

Time frame:
12 weeks
Reported as:
Mean · score on a scale
Patient Health Questionnaire-9
score on a scaleMgClControl
Patient Health Questionnaire-9-4.28 (-4.99 to -3.56)-0.09 (-0.90 to 0.72)
Statistical analysis
  • MgCl vs Control · Regression, Linear · Diiference in differences: 1.5
SecondaryGeneralized Anxiety Disorder 7 Item Questionnaire

Change in score from week 1 to week 6 and week 7 to 12 (difference in differences) GAD-7 score has been shown to be a valid indication of anxiety symptoms. The GAD-7 score can range from 0 to 21, with the following severity scores: 0-4 None; 5-9 Mild; 10-14 Moderate; 15-21 Severe.

Time frame:
12 weeks
Reported as:
Mean · scores on a scale
Generalized Anxiety Disorder 7 Item Questionnaire
scores on a scaleMgClControl
Generalized Anxiety Disorder 7 Item Questionnaire-3.88 (-4.70 to -3.07)0.80 (0.02 to 1.59)
SecondaryChange in Headaches While Taking Supplements

Change in headaches compared to normal during the 6 weeks on supplements. Change was calculated from 2 time points-start of supplements and end of supplements. Change was recorded as 0, None (same) 1. Mild 2. Moderate 3. Severe (worse)

Time frame:
12 weeks
Reported as:
Mean · score on a scale
Change in Headaches While Taking Supplements
score on a scaleMgClControl
Change in Headaches While Taking Supplements-0.14 (-0.25 to -0.03)-0.14 (-0.25 to -0.03)

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Mg Supplementation0/62 (0%)0/62 (0%)0/62 (0%)
Control0/64 (0%)0/64 (0%)0/64 (0%)

Baseline characteristics

Age, Continuous
Age, Continuous(years)Entire Study Population
Mean52.4 ± 12.9
Sex: Female, Male
Sex: Female, Male(Participants)Entire Study Population
Female78
Male48
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Entire Study Population
American Indian or Alaska Native0
Asian1
Native Hawaiian or Other Pacific Islander0
Black or African American2
White123
More than one race0
Unknown or Not Reported0
Region of Enrollment
Region of Enrollment(Participants)Entire Study Population
United States126
08

Study locations

1 site
  • University of Vermont
    Burlington, Vermont 05401, United States
09

References and documents

Study documents

  • Study protocol · Apr 21, 2015
  • Informed consent form · Jan 11, 2016

Documents are hosted by the registry — open the source record to download them.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 8, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02466087
Lead sponsor
University of Vermont
Responsible party
Emily Tarleton (Bionutrition Research Manager, University of Vermont) — Principal investigator
First posted
Jun 9, 2015
Start date
May 2015
Primary completion
May 2016
Completion
Dec 2016
Results posted
May 8, 2019
Last update
May 8, 2019

Study contacts

Emily Tarleton, MS, RD
principal investigator · University of Vermont

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Apr 2019. You cannot join it, but the record below documents what was studied.

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