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The objective of this study is to see the effects of changing dairy intake in healthy New Zealand participants on blood levels of ruminant trans fats, and on the metabolic syndrome

single centre randomised controlled study to assess the effects of changing dairy intake for 1 month on components of the metabolic syndrome and on fatty acids in healthy volunteers

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12612000574842
Acronym
DAISY NZ
Enrollment
180
Registered
2012-05-29
Start date
2011-02-15
Completion date
Unknown
Last updated
2020-01-13

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

Conditions

None listed

Brief summary

It is well established that industrial trans fatty acids (TFA) are harmful to health however, little is known about the effects of the natural TFA found in dairy. Some like the FDA feel that all TFA is harmful and have recommended that intake be limited as much as possible. An observational study by CVRU suggests that dairy TFAs may be harmful to cardiac health. Conversely a recent Harvard University observational cross sectional study observed that these isomers reduced insulin resistance. This interventional study is a randomised clinical study in 180 participants and assesses the effects of changing dairy intake on TFA, inflammatory markers, lipids, insulin resistance and anthropomorphic parameters.

Interventions

Arm 1- increased dairy consumption by 2 standards servings/day Arm 2- eliminate all dairy as much as possible Arm 3- no change for 4 weeks. All participants had a one to one session with a study co ordinator with exerience in giving dietary advice on on one. A sheet with tips on how to change dairy intake(when applicable) was also given to all participants

Sponsors

auckland city hospital
Lead SponsorHospital

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Prevention
Masking
Open (masking not used)

Eligibility

Sex/Gender
All
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

Aged over 18 years of age Able to give informed consent

Exclusion criteria

1. Unwilling to trial dietary intervention 2. lactose intolerant/milk allergy 3. pregnant/lactating 4. Known vitamin D deficiency or hypocalcaemia 5. Osteoporosis. 6. Inflammatory conditions e.g. rheumatoid arthritis 7. On a statin 8. Known cardiovascular disease (stroke, ischemic heart disease, peripheral vascular disease)

Outcome results

None listed

Source: ANZCTR · Data processed: Mar 10, 2026