Please select the eligibility criteria that correspond to the clinical trial below.
Title: Effects of Dietary Protein From Meat vs. Dairy on Infant Growth, Body Composition and Gut Health
Brief Summary: Current research shows that dairy protein accelerates infant weight gain, which is a risk factor for later on obesity and metabolic syndrome. However, dietary protein from other sources haven't been studied yet. This longitudinal study will compare two complementary feeding regimens with dietary protein mainly from 1) meat; 2) dairy on infant growth, body composition and gut microbiome from 5 to 12 months of age in formula fed infants. Healthy infants at approximately 5 months of age will be randomized to either a meat protein, or a dairy protein group with complementary protein mainly from meat or dairy. Infants will consume one of these diets for 7 months (6-12 months of age) and infant growth, body composition, growth biomarkers and gut microbiome will be measured to compare between groups and over time.


Options:
A: Inclusion Criteria:

* 3 months of age

Exclusion Criteria:

* birth wt \<2000 g
* any chronic disease or condition that affects growth
* not breastfed
B: Inclusion Criteria:

* Infants born in study communities who will reach 6 months of age during the six month period after initiation of the study

Exclusion Criteria:

* Infants likely to receive free or subsidized complementary foods (or infant formula)
* Families likely to relocate during the study period
* Infants with known congenital anomaly
* Infants of multiple birth
* Infants with neurological deficit apparent at the time of enrollment
C: Inclusion Criteria:

* 1-5 months of age
* Formula fed
* On breast milk less than 1 month
* Healthy
* Term Birth (36-42 weeks)
* Appropriate for gestational age

Exclusion Criteria:

* Congenital anomalies that impact feeding, growth, or development
* Low birth weight
* Not able to consume milk-based formula
* Known chronic diseases or allergies affecting protein consumption/digestion
D: Inclusion Criteria:

* Inclusion criteria for clusters: Each cluster will be a rural community characterized by inhabitants with low income and served by one community health center. A primary criterion is that national or other available statistics indicate a prevalence of stunting (mean length for age Z-scores in second year \< -2) of at least 20% in young children.
* Inclusion criteria for individual families:

  * Infant aged 3-4 months;
  * Primarily or exclusively breast feeding with intent to continue breast feeding through at least 1 year.

Exclusion Criteria:

* Exclusion criteria for individual families: Exclusion criteria include any population/family that is receiving or likely to receive free or subsidized complementary foods (or infant formula) through the health system or NGOs; any individual families who are feeding or intend to feed fortified infant formula or micronutrient-fortified commercial complementary foods.
* Exclusion criteria for infants: Infants meeting the following criteria will be excluded from participation:

  1. known congenital anomaly;
  2. infant of multiple births;
  3. known neurological deficit apparent at the time of enrollment (including seizures).

Answer: C