Diabetes Visual Function Supplement Study

NCT ID: NCT01646047

Last Updated: 2015-01-22

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

70 participants

Study Classification

INTERVENTIONAL

Study Start Date

2012-05-31

Study Completion Date

2014-09-30

Brief Summary

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This study will evaluate the effects of a novel multi-component dietary supplement on the visual function and retinal structure of patients with diabetes with both no diabetic retinopathy and mild to moderate diabetic retinopathy. This is a placebo-controlled trial and neither subjects nor examiners will know if any given subject is taking active supplement or placebo.

The hypothesis is that the supplement will improve visual function and retinal structure in subjects on active supplement

Detailed Description

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Adult patients with either type 1 or type 2 diabetes will be enrolled with baseline measurement of visual acuity, contrast sensitivity, color vision, threshold macular perimetry, macular pigment optical density, optical coherence tomography, glycosylated hemoglobin, blood lipids and serum vitamin D status. A multi-component dietary supplement containing ingredients currently available over the counter in the US will be taken for six months and repeat measurements of the above parameters obtained.

Conditions

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Diabetes Mellitus - Type 1 Diabetes Mellitus - Type 2 Non-proliferative Diabetic Retinopathy

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

SUPPORTIVE_CARE

Blinding Strategy

TRIPLE

Participants Caregivers Investigators

Study Groups

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supplement - no retinopathy

subjects receiving active supplement and with no retinopathy based on clinical examination

Group Type EXPERIMENTAL

multi-component nutritional supplement capsules

Intervention Type DIETARY_SUPPLEMENT

two capsules containing nutritional supplements per day for 6 months (vitamin C, mixed tocopherols/tocotrienols, vitamin D, fish oil, lutein, zeaxanthin, pine bark extract, benfotiamine, green tea extract, curcumin)

placebo - no retinopathy

patients receiving placebo and who have no diabetic retinopathy based on clinical examination

Group Type PLACEBO_COMPARATOR

multi-component dietary supplement

Intervention Type DIETARY_SUPPLEMENT

placebo capsules

supplement - retinopathy

patients receiving the active supplement and who have mild to moderate non-proliferative diabetic retinopathy based on clinical examination

Group Type EXPERIMENTAL

multi-component nutritional supplement capsules

Intervention Type DIETARY_SUPPLEMENT

two capsules containing nutritional supplements per day for 6 months (vitamin C, mixed tocopherols/tocotrienols, vitamin D, fish oil, lutein, zeaxanthin, pine bark extract, benfotiamine, green tea extract, curcumin)

placebo - retinopathy

patients receiving placebo and who have mild to moderate non-proliferative diabetic retinopathy based on clinical examination

Group Type PLACEBO_COMPARATOR

multi-component dietary supplement

Intervention Type DIETARY_SUPPLEMENT

placebo capsules

Interventions

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multi-component nutritional supplement capsules

two capsules containing nutritional supplements per day for 6 months (vitamin C, mixed tocopherols/tocotrienols, vitamin D, fish oil, lutein, zeaxanthin, pine bark extract, benfotiamine, green tea extract, curcumin)

Intervention Type DIETARY_SUPPLEMENT

multi-component dietary supplement

placebo capsules

Intervention Type DIETARY_SUPPLEMENT

Other Intervention Names

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two placebo capsules per day for six months

Eligibility Criteria

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Inclusion Criteria

* diabetes mellitus diagnosed at least 5 years
* age greater than or equal to 18 years
* English speaker

Exclusion Criteria

* proliferative diabetic retinopathy or severe non-proliferative retinopathy
* clinically significant macular edema
* corrected visual acuity less than 20/30 in either eye
* diagnosis of other serious eye disease (glaucoma, age-related maculopathy)
* less than 18 years old
* non-English speaker
* no known allergy or sensitivity to any supplement ingredients
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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ZeaVision, LLC

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Alan P. Chous, O.D.

Role: PRINCIPAL_INVESTIGATOR

Chous Eye Care Associates

Locations

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Chous Eye Care Associates

Tacoma, Washington, United States

Site Status

Countries

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United States

References

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Robertson NU, Schoonees A, Brand A, Visser J. Pine bark (Pinus spp.) extract for treating chronic disorders. Cochrane Database Syst Rev. 2020 Sep 29;9(9):CD008294. doi: 10.1002/14651858.CD008294.pub5.

Reference Type DERIVED
PMID: 32990945 (View on PubMed)

Chous AP, Richer SP, Gerson JD, Kowluru RA. The Diabetes Visual Function Supplement Study (DiVFuSS). Br J Ophthalmol. 2016 Feb;100(2):227-34. doi: 10.1136/bjophthalmol-2014-306534. Epub 2015 Jun 18.

Reference Type DERIVED
PMID: 26089210 (View on PubMed)

Other Identifiers

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20112190

Identifier Type: -

Identifier Source: org_study_id

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