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The Diet and Breast Milk Composition Study

The short-term impact of consuming a breakfast meal containing high levels of fat or sugar in breastfeeding women on the concentrations of macronutrients and metabolic hormones in their breast milk over the subsequent 12 hours

Status
Not yet recruiting
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12618000613202
Enrollment
25
Registered
2018-04-19
Start date
2020-03-02
Completion date
2020-07-31
Last updated
2019-12-10

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

Conditions

None listed

Brief summary

Breast milk is made up of nutrients including fat and sugar. It also contains hormones that help control how hungry or full we feel and how our body uses energy. When a mother breastfeeds, these hormones are transferred from the breast milk to the baby and may play a role in how baby grows and develops. We now know that what a mother eats while breastfeeding can affect how much breast milk she produces, but we still know very little about how this affects breast milk composition, including the levels of these hormones. The purpose of this study is to look at how consuming a breakfast meal containing different levels of fat and sugar affects the amounts of nutrients and other factors, including hormones in breast milk over the following 12 hours. This research will help us to understand the effect of different dietary choices during breastfeeding on the composition of the breast milk and, in the future, may help inform dietary guidelines for breastfeeding women.

Interventions

Breastmilk composition will be measured a regular intervals for the 12 hours following consumption of either a high-fat, high-sugar or control breakfast meal (all participants consume each breakfast at separate clinic sessions at least one week apart and in random order). The dietary interventions will be provided in the form of a specially designed breakfast meal which either aligns with the fat and sugar content consistent with the Australian Guide to Healthy Eating (AGHE) (control, 12g fat a

Breastmilk composition will be measured a regular intervals for the 12 hours following consumption of either a high-fat, high-sugar or control breakfast meal (all participants consume each breakfast at separate clinic sessions at least one week apart and in random order). The dietary interventions will be provided in the form of a specially designed breakfast meal which either aligns with the fat and sugar content consistent with the Australian Guide to Healthy Eating (AGHE) (control, 12g fat and 25g sugar) or contains higher levels of fat (high-fat, 28g fat) or higher levels of sugar (high-sugar, 57g sugar). The breakfast meal will be provided at ~7:30am after women have fasted from midnight on the previous day. Women will receive a text message/phone call to remind them of the need to fast on the day before the appointment and will be asked to confirm adherence to the fast at the start of their appointment. The breakfast meals will contain similar foods (cereal, milk, yogurt, toast and spread) and will be matched for total energy content as closely as possible.

Sponsors

The University of Adelaide
Lead SponsorUniversity

Study design

Allocation
Non-randomised trial
Intervention model
Crossover
Primary purpose
Prevention
Masking
Open (masking not used)

Eligibility

Sex/Gender
All
Age
18 Years to 60 Years
Healthy volunteers
Yes

Inclusion criteria

- Women who are currently breastfeeding -Singleton pregnancy - Term delivery - Mothers between 6 weeks and 16 weeks post-partum at the time of the first study visit

Exclusion criteria

- Known major congenital abnormalities or health issues in the infant that could significantly affect feeding behavior - Complimentary feeding introduced before first study session - Maternal diseases known to affect gastric absorption - Maternal diabetes - Restrictive diets (e.g. gluten free, dairy free, milk free, vegan)

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026