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Summary
Ketotic hypoglycemia, common in children aged 18 months to 5 years, is diagnosed by low blood sugar with ketosis. Affected children cannot tolerate fasting or ketogenic diets, showing lower plasma alanine levels.
Area of Science:
- Pediatrics
- Endocrinology
- Metabolic Disorders
Background:
- Ketotic hypoglycemia is the most frequent type of hypoglycemia in children.
- It typically appears between 18 months and 5 years, resolving by age 8-9.
- Diagnosis involves low blood sugar with ketosis and characteristic symptoms.
Purpose of the Study:
- To summarize the clinical presentation and diagnostic criteria for ketotic hypoglycemia.
- To highlight the metabolic differences in children compared to adults regarding glucose regulation.
Main Methods:
- Review of clinical presentation and diagnostic markers.
- Discussion of provocative ketogenic diet and fasting challenges.
- Analysis of plasma alanine concentrations in affected versus normal children.
Main Results:
- Definitive diagnosis confirmed by inability to tolerate fasting or ketogenic diet within 24 hours.
- Ketotic hypoglycemic children exhibit significantly lower plasma alanine levels.
- Normal children can also develop hypoglycemia and ketonemia with short-term caloric deprivation.
Conclusions:
- Ketotic hypoglycemia is a distinct childhood disorder with specific diagnostic criteria.
- Metabolic responses to fasting differ between children and adults.
- Lower plasma alanine may be a marker for susceptibility to ketotic hypoglycemia.