ClinicalTrials.gg
CompletedNCT03640104Updated Apr 28, 2021

Individualized Dietary Intervention in Breastfeeding Women: Body Weight and Vitamin A Stores

An interventional study of Intervention-Nutrition guidelines and Nutrition guidelines in Overweight and Obesity, Vitamin A Deficiency and Dietary Modification, sponsored by Universidad de Sonora. Completed at 1 site in Mexico. Open to female participants aged 18 Years to 40 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-04-28.

Primary conditionObesityRegistry: OverweightReclassifiedWhy we changed it
Registry
Overweight — the first condition term the registry derived for this study.
ClinicalTrials.gg
Obesity
Why
  1. The study's listed conditions name Obesity, a narrower term within Overweight.
Confidence
High: the new condition is named in the study's own listed conditions. Of 351 hand-checked studies reclassified this way, 68% were exactly right and 84% in the right disease family; the registry's first term was right for 5% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by Universidad de Sonora · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
30
Allocation
Randomized
Ages
18 Years to 40 Years
Sex
Female
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 212 studies in Obesity with a site in Mexico — 42 open to participants now, 61 under way, 29 of them phase 3. Obesity · Mexico.

Enrollment
163rd of 190
30 · median 104
Started
2018
with 18 others
No phase
99 of 212
15 open now
Registered
75th of 212
by date
Lead sponsor
8 of 212
Universidad de Sonora

Among the 212 studies in Obesity with a site in Mexico, this one is the 163rd largest by enrollment of the 190 interventional ones that give a count, is one of 19 that started in 2018, is one of 99 with no phase, and was the 75th registered.

Obesity

11,529 studies on the registry are indexed under Obesity; 2,035 are open to participants now.

Browse Obesity studies →

Open to participants now

42 of the 212 studies in Obesity with a site in Mexico are open now. Recruiting first, the newest first:

37 more — sign in →

All 42 open studies →

A study can be open while its sites in Mexico have not opened yet or have stopped. Only those recruiting at a site in Mexico →

Who these studies take

Of the 1,336 Obesity studies recruiting now, 377 (28%) set no upper age limit and 856 (64%) stop at 75 or younger; 166 take children under 18; 488 take healthy volunteers.

This study: 18 Years to 40 Years · female · healthy volunteers too.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 212 studies in Obesity with a site in Mexico, or all of them as a file.
02

Study summary

Breast milk is the best food during the first 6mo of life because it offers multiple benefits for the mother-infant pair. An inadequate maternal diet during pregnancy can lead to excess weight gain, leading to negative health consequences for the dyad. In Mexico, an excess of body weight coexists with micronutrient deficiencies (double burden of malnutrition). Low vitamin A concentration has been observed in northwest Mexico, which can affect the human milk composition and increase the risk of VAD in breastfed babies. An individualized dietary intervention in the lactating woman will reduce body weight and improve vitamin A status. The objective is to assess the effect of an individualized dietary intervention during 3 months postpartum on body composition and vitamin A status of lactating women.

Read the detailed description

This protocol was approved by the Bioethics Committee of the Department of Medicine and Health Sciences of Universidad de Sonora. A randomized controlled trial will be carried out and participant women will be assigned by simple randomization 1:1 to either the intervention or control group, upon signing an informed consent. At baseline (2wk postpartum), anthropometric (weight, height, mid upper-arm circumference and triceps skinfold thickness) and body composition (DXA) measurements as well as the assessment of vitamin A status (serum and breastmilk retinol and the modified relative dose response) will be performed. The control group will receive only recommendations for a healthy diet in accordance with international standards and will be followed up every month to promote adherence and to assess their nutritional status. On the other hand, the intervention group will receive an individualized macronutrient meal equivalent menu, with nutritional consultations every two weeks. The dietary plan will include 1-1.5 g/kg body weight protein, 30% total fat (preferably mono and polyunsaturated fatty acids), and vitamin A sources (1300 RAE). After 3 months of intervention are completed, baseline measurements will be repeated. Statistical analysis will include descriptive stats and comparisons between groups (t-tests), significance will be defined as P \< 0.05.

03

Conditions studied

  • Overweight and Obesity
  • Vitamin A Deficiency
  • Dietary Modification
  • Breastfeeding

Browse trials for

Keywords

  • Food-based intervention
  • postpartum weight management
  • hepatic retinol
04

In context

Obesity Reclassified

11,529 studies on the registry are indexed under Obesity; 2,035 are open to participants now.

This study's enrollment of 30 is below the median of 67 across 9,010 interventional studies indexed under Obesity.

Browse Obesity studies →

Lead sponsor

Universidad de Sonora is the lead sponsor of 15 studies on the registry; 1 is open to participants now.

Compared within Obesity, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Overweight. The counts are of registry records indexed under each term, refreshed daily. How we classify →

05

Who can participate

Ages eligible
18 Years to 40 Years
Sexes eligible
Female
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • ≥ 25
  • Predominant breastfeeding
  • Signed

Exclusion criteria

Exclusion Criteria:

  • Multiparity
  • Alcohol, drugs, tobacco intake
  • Use of dietary supplements
  • Active infection (C reactive protein > 6mg/L)
  • External nutritional counseling
  • Pregnancy during the study period
  • Liver disease
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

06

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
30 participants (actual)

Study arms

  • Experimental
    Intervention-Nutrition guidelines

    Subjects will receive an individualized dietary plan according to their nutritional status, socioeconomic and cultural preferences. Protein intake 1-1.5g/kg body weight; 30% fat (mono and polyunsaturated fatty acids), vitamin A sources (1300 RAE). Each subject will have 7 interchangeable options for every meal time, all equivalent in macronutrient content, and every two weeks a new menu will be provided by a nutritionist.

    Behavioral: Intervention-Nutrition guidelines

  • Other
    Nutrition Guidelines

    Participants will receive general nutritional recommendations according to international standards

    Behavioral: Nutrition guidelines

Interventions

  • BehavioralIntervention-Nutrition guidelines

    Subjects will receive an individualized dietary plan according to their nutritional status, socioeconomic and cultural preferences. Protein intake 1-1.5g/kg body weight; 30% fat (mono and polyunsaturated fatty acids), vitamin A sources (1300 RAE). Each subject will have 7 interchangeable options for every meal time, all equivalent in macronutrient content, and every two weeks a new menu will be provided by a nutritionist.

  • BehavioralNutrition guidelines

    Nutritional recommendations based on international guidelines

07

What researchers measure

Primary outcomes

  1. Total Body weight

    Difference in change (between baseline and final body weight within groups) between the intervention and control group, respectively

    Time frame: Baseline and 3 months after enrollment

  2. Vitamin A liver stores

    Stores are calculated as the DR/R ratio. The outcome will be calculated as the difference in change (between baseline and final VA stores within groups) between the intervention and control group, respectively

    Time frame: Baseline and 3 months after enrollment

Secondary outcomes

  1. Body fat mass

    Difference in change (between baseline and final body fat mass within groups) between the intervention and control group, respectively

    Time frame: Baseline and 3 months after enrollment

  2. Retinol

    Difference in change (between baseline and final retinol concentration within groups) between the intervention and control group, respectively

    Time frame: Baseline and 3 months after enrollment

08

Study locations

1 site
  • Universidad de Sonora
    Hermosillo, Sonora 83000, Mexico
09

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Nov 2018 to primary completion in Feb 2020, 15 months.

Of 3,683 non-industry interventional studies with no phase under Obesity, half reached primary completion within 23 months of starting (the median), counting those still running; a quarter within 10 and three quarters within 43. This study's 15 months is below that.

Counting every sponsor, half of 3,846 studies reached it within 22 months; a quarter within 9 and three quarters within 42.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 17, 2018
First posted
Aug 21, 2018
StartActual
Nov 1, 2018
Primary completionActual
Feb 7, 2020
CompletionActual
Feb 7, 2020
Last update
Apr 28, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Apr 28, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03640104
Lead sponsor
Universidad de Sonora
Collaborators
Centro de Investigación en Alimentación y Desarrollo A.C., University of Wisconsin, Madison
Responsible party
Verónica López Teros, PhD (Research professor, Universidad de Sonora) — Principal investigator
First posted
Aug 21, 2018
Start date
Nov 1, 2018
Primary completion
Feb 7, 2020
Completion
Feb 7, 2020
Last update
Apr 28, 2021

Study contacts

Veronica Lopez-Teros, Dr
principal investigator · Universidad de Sonora

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Apr 2021. You cannot join it, but the record below documents what was studied.

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