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Vitamin d could be a simple fix for diabetic nerve pain

NCT ID NCT07644520

Symptom relief Sponsor: Tanta University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Sep 09, 2026 · Updated 2 times

Summary

This study tests whether taking vitamin D supplements can reduce nerve pain, improve sleep, and boost quality of life in people with type 2 diabetes who have nerve damage. Researchers will give vitamin D to 150 adults with low vitamin D levels and track their pain and sleep over 12 weeks. If successful, it could offer a simple, low-cost way to manage a common and painful diabetes complication.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Vitamin D supplement
What this could lead to
If it works, this could offer a simple, low-cost way to reduce nerve pain and improve sleep and daily life for people with diabetic neuropathy.
What could go wrong
This is a mid-stage trial with only 150 participants, and earlier studies have shown mixed results. Vitamin D may not provide significant relief, and benefits may vary from person to person.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 2/3

Runs two stages together: whether the treatment works, then large-scale confirmation.

Participants

About 150 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Oct 2026

An estimate. Start dates often move.

Expected to finish

Oct 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion criteria Participants must fulfill all the following: 1\. Age between 18 and 75 years 2. Diagnosed with type 2 diabetes mellitus according to ADA criteria 3. Clinically diagnosed diabetic peripheral neuropathy 4. Neuropathic symptoms for at least 3 months 5. Vitamin D insufficiency or deficiency: * Serum 25(OH)D \< 30 ng/mL 6. Stable antidiabetic treatment for at least 3 months Exclusion criteria 1. Type 1 diabetes mellitus 2. Current vitamin D supplementation within the previous 3 months 3. Severe renal impairment (eGFR \< 30 mL/min/1.73m²) 4. Severe hepatic impairment 5. Hypercalcemia 6. Malabsorption syndromes 7. Pregnancy or lactation 8. Peripheral neuropathy due to causes other than diabetes: * Vitamin B12 deficiency * Hypothyroidism * Alcoholic neuropathy * Chemotherapy-induced neuropathy 9. Active malignancy 10. Severe psychiatric illness

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Conditions

The condition(s) this trial relates to.

diabetic kidney disease diabetic neuropathy type 2 diabetes mellitus

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Diabetic nephropathy type 2

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    Open the record ↗

  2. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

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Other studies related to the condition(s) this trial covers.