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CompletedNCT00351624Updated May 20, 2014

Effects of Docosahexaenoic Acid (DHA) on Cognitive Function in Children 4 Years of Age

A Phase 3 interventional study of DHA and placebo in Healthy, sponsored by DSM Nutritional Products, Inc.. Completed at 10 sites in United States. Open to participants aged 4 Years to 4 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2014-05-20.

Sponsored by DSM Nutritional Products, Inc. · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
216
Allocation
Randomized
Ages
4 Years to 4 Years
Sex
All
01

Study summary

The primary objective of this study is to determine whether a 4-month period of supplementation with 400 mg/day of docosahexaenoic acid (DHA) provided from chewable softgel capsules containing bubblegum flavored microalgal oil (DHASCO-S) versus placebo improves one or more cognitive measures of attention, memory, processing speed, and error rate in healthy children 4 years of age.

The secondary objectives are to measure the safety and tolerability of the DHA dose administered and to measure blood DHA levels before and after supplementation.

Read the detailed description

DHA is the primary omega-3 fatty acid present in the brain and retina and plays crucial structural and functional roles in these issues. The primary dietary source of DHA is fatty fish (e.g., salmon, herring, tuna). The American diet provides one of the lowest levels of omega-3 fatty acids of most industrialized nations. Children between the ages of 1 and 5 years consume only 30 to 50 mg DHA per day despite high requirements for this nutrient to support growth and tissue turnover.

Studies with human infants have reported visual and cognitive benefits of DHA supplementation in early life. Reported benefits include significant improvements on tests of visual acuity during infancy, psychomotor or mental development in the first two years of life, and problem-solving and sustained attention around 5 years of age.

Few studies have evaluated the effect that DHA supplementation has on the cognitive function of older children. Studies that considered DHA supplementation in children 4-12 years of age with attention-deficit/hyperactivity disorder (ADHD) or other developmental disorders have shown improvements on several measures of attention, behavior, and executive function.

Given the estimated high requirements of DHA to support growth and maintenance of the brain, the low consumption of DHA by American children, and the evidence from human and animal studies that DHA status affects the functional capacity of the central nervous system, there is a reasonable expectation that DHA supplementation administered to preschool-aged children will improve performance on tests of attention, memory, processing speed, and error rate.

02

Conditions studied

  • Healthy

Keywords

  • DHA supplementation
  • Cognitive function
  • Preschool children
  • Attention and behavior
  • Healthy Children
03

In context

Lead sponsor

DSM Nutritional Products, Inc. is the lead sponsor of 37 studies on the registry; none are open to participants now.

Of its 5 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.

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

04

Who can participate

Ages eligible
4 Years to 4 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Male or female, age at enrollment between 4 years 0 months and 4 years 8 months
  • Height and weight between the 10th and 90th percentiles of the National Center for Health Statistics (NCHS) growth charts
  • Subject must meet normal developmental milestones.
  • Subject able to understand instructions provided during the cognitive testing, i.e. English must be the primary language in the home
  • No evidence of a medical condition that would preclude successful response or outcome (e.g., uncorrected vision or hearing impairment, attention deficit disorder, or inborn error of metabolism)
  • Not taking any medications for seizure disorder, anxiety disorders (e.g., Valium or related compounds), ADHD (e.g., Ritalin, Adderall, Concerta, Strattera, or similar medication), childhood psychosis (e.g., Haldol, Risperdal), depression (e.g., Prozac), or for bipolar disorder. A subject will not be withdrawn from the trial if he/she needs to take one of these medications after enrollment. Antihistamines (e.g., Benadryl or other antihistamines) should not be administered within 24 hours of the day of the cognitive exams (Claritin or Allegra are allowed). If a subject is taking an antihistamine on the day of the cognitive tests, the tests will be rescheduled.

Exclusion criteria

Exclusion Criteria:

  • Premature birth (\< 36 weeks gestation)
  • Family history of ADHD
  • Subject consumes > 3 oz. of fish more than 2 times per week.
  • Subject consumes dietary supplements or foods containing or fortified with omega-3 fatty acids.
  • Subject received any investigational product within the past 30 days.
  • Subject having any medical condition that in the opinion of the principal investigator would preclude a successful response or outcome (e.g., uncorrected vision or hearing impairment, attention deficit disorder or inborn error of metabolism)
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double
Enrollment
216 participants (actual)

Study arms

  • Active comparator
    DHA

    Behavioral: DHA

  • Placebo comparator
    placebo

    Behavioral: placebo

Interventions

  • BehavioralDHA
  • Behavioralplacebo
06

What researchers measure

Primary outcomes

  1. Leiter Test of Sustained Attention

  2. Kiddie Continuous Performance Test (kCAP)

  3. Peabody Picture Vocabulary Test

  4. Day-Night Stroop Test

Secondary outcomes

  1. Safety and tolerability of the DHA dose

  2. Blood DHA levels before and after DHA supplementation

07

Study locations

10 sites
  • Impact Clinical Trials
    Los Angeles, California 90010, United States
  • Clinical Research Atlanta
    Stockbridge, Georgia 30281, United States
  • Northern Illinois Research Associates
    Dekalb, Illinois 60135, United States
  • Pedia Research
    Owensboro, Kentucky 42301, United States
  • Clinical Research Center of Nevada
    Las Vegas, Nevada 89104, United States
  • Eminence Research, LLC
    Oklahoma City, Oklahoma 73118, United States
  • Prevention and Strengthening Solutions, Inc.
    Humboldt, Tennessee 38343, United States
  • Southwest Children's Research Associates
    San Antonio, Texas 78229, United States
  • Charlottesville Medical Research
    Charlottesville, Virginia 22911, United States
  • Children's Hospital of the King's Daughters/Eastern Virginia Medical School
    Norfolk, Virginia 23510, United States
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 20, 2014, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00351624
Lead sponsor
DSM Nutritional Products, Inc.
First posted
Jul 13, 2006
Start date
May 2006
Completion
Sep 2007
Last update
May 20, 2014

Study contacts

Alan S Ryan, PhD
study director · DSM Nutritional Products, Inc.
View the source record on ClinicalTrials.gov ↗

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