Macro partitioning
A high-carbohydrate diet (CHORD) commonly prescribed for CPTII deficiency may be detrimental long-term by causing hyperinsulinemia, which inhibits CPT enzymes and diverts fatty acids to storage, potentially worsening insulin resistance and metabolic health.
Current advice to eat a very high-carb, low-fat diet might be hurting your long-term health. Try shifting to a moderate-carb diet (50-55% of calories) with higher protein (25-30%). This helps lower insulin levels, which may improve your body's ability to manage fatty acids and reduces the risk of insulin resistance.
a CHORD could also be inadequate for a long-term overall health management of these patients, considering the possible negative effects on glucose homeostasis and fat metabolism over time... CHORD promotes chronic hyperinsulinemic response... Hyperglycemia with hyperinsulinemia functionally reduces the CPTI activity in muscle cell, involving the regulatory role of malonyl-CoA
Why this rating
Based on theoretical biochemical mechanisms and general population studies on high-carb diets; limited direct evidence in CPTII patients.
Source
Exercise, Nutrition, and Supplements in the Muscle Carnitine Palmitoyl-Transferase II Deficiency: New Theoretical Bases for Potential Applications
Massimo Negro et al. · Frontiers in Physiology · 2021
DOI 10.3389/fphys.2021.704290
More from this paper
- High-intensity interval training (HIIT) or resistance training (RT) is safe and effective for patients with muscle Carnitine Palmitoyl-Transferase II (CPTII) deficiency because these activities rely on glycogen/phosphocreatine pathways rather than long-chain fatty acid oxidation, thereby avoiding rhabdomyolysis triggers.Moderate
- Supplementation with L-carnitine is not recommended for CPTII deficiency patients because it does not significantly improve muscle carnitine content, may increase cardiovascular risk via TMAO production, and acyl-carnitine accumulation cannot be fully processed due to the enzyme defect.Moderate
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