Once enrolled, the infants were randomly assigned to one of two groups: consumption of at least 6 grams of peanut protein per week or peanut avoidance. The study participants remained on their assigned treatments until months of age.

60 months of age.

Explanation:

The above question reports a part of a study carried out to define the existence and degree of allergy in babies in relation to the consumption of peanut.

When establishing a scientific experience like this, it is necessary that all beings being tested present the same opportunities for growth and development, so that the variables can act without external interference. In the research shown in the question above, babies remained in the study treatments until 60 months of age, which allowed their bodies to develop with the same possibilities.