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Amino Acid

Vitamin D + L-cysteine for Vitamin D Deficiency

Phase < 1
Waitlist Available
Research Sponsored by Louisiana State University Health Sciences Center Shreveport
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Be older than 18 years old
Timeline
Screening 3 weeks
Treatment Varies
Follow Up 6 months
Awards & highlights

Study Summary

This trial is testing whether vitamin D, when taken with the amino acid L-cysteine, is more successful than vitamin D alone at treating symptoms related to Alzheimer's disease in African Americans.

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~6 months
This trial's timeline: 3 weeks for screening, Varies for treatment, and 6 months for reporting.

Treatment Details

Study Objectives

Outcome measures can provide a clearer picture of what you can expect from a treatment.
Primary outcome measures
25-hydroxy-vitamin D
Secondary outcome measures
HOMA-IR
TNF-α

Trial Design

4Treatment groups
Experimental Treatment
Placebo Group
Group I: Vitamin D3 and L-CysteineExperimental Treatment1 Intervention
VD+LC group will take daily two capsule containing 1000 IU+500 mg LC. Supplements will be taken daily with food at breakfast for 6 months, while participants continue to carry on a normal lifestyle
Group II: Vitamin D3Experimental Treatment1 Intervention
VD group will take two capsules and each capsule will contain 1000 IU VD daily. Supplements will be taken daily with food at breakfast for 6 months, while participants continue to carry on a normal lifestyle
Group III: L-CysteineExperimental Treatment1 Intervention
LC group will receive two capsules of LC daily. Supplements will be taken daily with food at breakfast for 6 months, while participants continue to carry on a normal lifestyle
Group IV: PlaceboPlacebo Group1 Intervention
Initially, all of the study subjects will be provided placebo supplementation as a placebo run-in period for one month before randomization. The placebo run-in period is meant to stabilize subjects in the study and will prevent any effect due solely to inclusion in the study. Placebo and supplement capsules will be similar in appearance, taste, texture, and smell, and will be provided by the pharmacist, who will have the codes for which subjects are assigned to which supplement or placebo. During testing, the placebo group will take two placebo capsules a day in the morning. Supplements will be taken daily with food at breakfast for 6 months, while participants continue to carry on a normal lifestyle
Treatment
First Studied
Drug Approval Stage
How many patients have taken this drug
Vitamin D + L-cysteine
2020
Completed Early Phase 1
~170
L-cysteine
2020
Completed Phase 2
~180
Vitamin D
2013
Completed Phase 4
~3470

Find a Location

Who is running the clinical trial?

Louisiana State University Health Sciences Center ShreveportLead Sponsor
45 Previous Clinical Trials
17,054 Total Patients Enrolled

Frequently Asked Questions

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.
Recent research and studies
clinicaltrials.govStudy
Optimization of Blood Levels of 25(OH)-Vitamin D in African Americans
Sushil Jain 2020. "Optimization of Blood Levels of 25(OH)-Vitamin D in African Americans". ClinicalTrials.gov. https://clinicaltrials.gov/ct2/show/NCT04939792.
~37 spots leftby Apr 2025
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