The ketogenic diet is not for everyone: contraindications, side effects, and drug interactions
Abstract
Background: The ketogenic diet (KD), initially developed for the treatment of neurological disorders, has gained increasing attention for its potential role in the management of various metabolic diseases. Alongside its expanding clinical use, concerns have emerged regarding its safety, tolerability, and suitability in specific patient populations. This review summarises key contraindications, clinical situations requiring caution, relevant drug interactions, and commonly reported adverse effects associated with KD.
Discussion: Rare absolute contraindications include selected inborn errors of metabolism affecting pyruvate carboxylase activity, carnitine transport or utilisation, fatty acid oxidation pathways, as well as porphyria. Relative contraindications encompass acute pancreatitis, advanced hepatic or renal disease, familial hypercholesterolaemia, and other conditions that may be aggravated by KD-induced metabolic changes, including concomitant use of propofol. Particular caution is warranted in patients with type 1 or type 2 diabetes receiving specific glucose-lowering therapies, pharmacologically treated hypertension, gallbladder disease or prior cholecystectomy, electrolyte disturbances, cardiac arrhythmias, pregnancy or lactation, underweight status, intense physical activity, significant psychosocial stress, or postoperative recovery.Clinically relevant interactions with medications are reviewed, including sodium-glucose cotransporter 2 (SGLT2) inhibitors,…
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