Dietary and Nutritional Management of Glycogen Storage Disease Type VI
Glycogen storage disease type VI (GSD-VI) is a hepatic glycogen disorder that places patients at risk of hypoglycemia and ketosis, especially during fasting. First-line management is built on a structured dietary strategy designed to keep blood glucose and blood ketone levels within safe ranges throughout the day and overnight.
Dietary Approach
The protocol centres on preventing fasting intervals and structuring daily intake to maintain metabolic stability. Particular emphasis is placed on protein intake and on addressing the extended overnight fasting period — a recognised window of metabolic vulnerability in GSD-VI. The full evidence-based regimen specifies the composition and timing in detail.
Treatment Goals
- Blood glucose maintained between 70 and 100 mg/dL
- Blood ketones kept within the range of 0.0–0.2 mmol/L
References
DOI: 10.1038/s41436-018-0364-2
- For those who experience hypoglycemia or ketosis, avoidance of fasting and small frequent feedings is recommended.
- While a high protein diet that provides 2–3 g protein/kg body weight/day is considered to be helpful and generally recommended, the distribution of calories from carbohydrates, protein, and fat is still being debated.
- Corn starch (CS) ~1 g/kg body weight may be required at bedtime to prevent overnight hypoglycemia.
- The blood glucose (BG) should range between 70 and 100 mg/dL, and the target range for blood ketones is 0.0–0.2 mmol/L.
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