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ChocHealth for Kids! The effects of dark chocolate on children?s blood pressure

The effects of dark chocolate on children's blood pressure: a pilot randomised controlled trial

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN60409644
Enrollment
200
Registered
2010-09-27
Start date
2010-08-02
Completion date
Unknown
Last updated
2015-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hypertension Circulatory System Hypertension

Interventions

6 - 7 g of dark chocolate rich in antioxidants will be delivered by teachers to each participant in intervention arm classes on school days over School Term 4, in 2010 (about 8 weeks), and none will b

Sponsors

Murdoch Childrens Research Institute (MCRI) (Australia)
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: All Grade 5 and 6 children (aged between 10 - 13 years old, either sex) in participating classes whose parents consent

Exclusion criteria

Exclusion criteria: 1. Hypertension under pharmacological treatment 2. Major medical or developmental condition(s) limiting participation in the study (at the discretion of the research team and child's family) 3. Anaphylaxis to nuts (hazelnut or almond) or dairy in children who carry Epipen(s). Dark chocolate does not contain milk, and we will use varieties that do not contain nuts. However, chocolate manufacturers usually state that their chocolate is manufactured on equipment that is also used for foods that contain nuts and/or milk. Therefore, we think it prudent to exclude children with serious nut or milk allergy.

Design outcomes

Primary

MeasureTime frame
Measured at baseline and 8 weeks: 1. Acceptability and feasibility of the study as assessed by recruitment rate and participant (students and teachers) feedback 2. Blood pressure outcomes between intervention and control groups

Secondary

MeasureTime frame
Measured at baseline and 8 weeks: 1. Anthropometry - weight, height, BMI and waist girth 2. Percentage body fat, as measured by multiple frequency bioelectrical impedance analysis (BIA) 3. Health-related quality of life and body image - assessed through the 23-item PEDS QL 4.0 Child Self-Report, a validated measure of child quality of life, and a pictorial body perception and preference scale used in many of our previous studies

Countries

Australia

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026