What causes ftt

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Last updated: April 4, 2026

Quick Answer: Failure to thrive (FTT) in infants and children is typically caused by insufficient caloric intake, malabsorption of nutrients, or increased metabolic demands. These underlying issues can stem from a variety of factors including feeding difficulties, underlying medical conditions, or environmental challenges.

Key Facts

What is Failure to Thrive (FTT)?

Failure to thrive (FTT) is a term used to describe a condition in which a child is not growing or gaining weight as expected for their age. It's not a disease itself, but rather a sign that there may be an underlying problem affecting the child's growth and development. FTT is typically diagnosed when a child's weight or rate of weight gain falls below a certain percentile on standard growth charts, or when there's a significant drop in weight percentile over time.

Causes of Failure to Thrive

The causes of FTT are generally categorized into three main groups:

1. Insufficient Caloric Intake

This is the most common reason for FTT. It means the child is not consuming enough calories to meet their energy needs for growth and development. This can be due to a variety of factors:

2. Malabsorption of Nutrients

In this scenario, the child is consuming enough calories, but their body is unable to properly absorb the nutrients from the food. This can be caused by:

3. Increased Metabolic Demands

Sometimes, a child may eat a normal amount, but their body uses up calories at a much faster rate than usual, leading to insufficient weight gain. This is often due to underlying medical conditions:

Other Contributing Factors

Beyond these primary categories, several other factors can contribute to or exacerbate FTT:

Diagnosis and Management

Diagnosing FTT involves a thorough medical history, physical examination, and careful assessment of the child's growth patterns. Doctors will look at weight, height, and head circumference over time. They will also inquire about feeding habits, diet, family history, and any potential psychosocial stressors. Further tests, such as blood work or imaging studies, may be ordered to identify underlying medical conditions.

Management of FTT is tailored to the identified cause. It typically involves:

Early identification and intervention are key to improving outcomes for children with FTT, ensuring they receive the necessary support to achieve healthy growth and development.

Sources

  1. Failure to thrive - WikipediaCC-BY-SA-4.0
  2. Failure to Thrive - StatPearls - NCBI Bookshelffair-use
  3. Failure to Thrive - HealthyChildren.orgfair-use

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