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Published on: November 10, 2023
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A ketogenic diet substantially reshapes the human metabolome
David Effinger1, Simon Hirschberger1, Polina Yoncheva2
1Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilian-University Munich (LMU), Munich, Germany; Department of Anaesthesiology, Research Unit Molecular Medicine, University Hospital, LMU Munich, Munich, Germany.
Clinical Nutrition (Edinburgh, Scotland)
|June 3, 2023
Summary
A ketogenic diet (KD) rapidly alters human metabolism, improving insulin and triglyceride levels while increasing anti-inflammatory compounds. This safe intervention shows promise as a preventive and therapeutic tool for immune regulation.
Area of Science:
- Immunometabolism
- Nutritional Science
- Metabolomics
Background:
- Western diets (WD) promote chronic inflammation linked to non-communicable diseases.
- Ketogenic diets (KD) are emerging as immune-regulating countermeasures for WD-induced metaflammation.
- Previous research attributed KD benefits solely to ketone bodies, overlooking broader metabolic shifts.
Purpose of the Study:
- To investigate comprehensive changes in the human metabolome induced by KD.
- To identify specific metabolites contributing to KD's positive effects on immunity.
- To recognize potential health risks associated with KD.
Main Methods:
- Prospective nutritional intervention study with 40 healthy volunteers.
- Three-week ad-libitum KD followed by untargeted metabolomic analysis of serum.
- Analysis of the tryptophan pathway in urine.
Main Results:
- KD significantly reduced insulin and c-peptide levels without affecting blood glucose.
- Metabolomic analysis revealed a shift towards mitochondrial fatty acid oxidation with elevated free fatty acids and acylcarnitines.
- Increased anti-inflammatory fatty acids and altered amino acid profiles were observed, alongside changes in the tryptophan pathway.
Conclusions:
- A KD profoundly alters the human metabolome within three weeks.
- KD improves metabolic markers, enhances anti-inflammatory pathways, and supports mitochondrial function.
- No metabolic risk factors were identified, suggesting KD is a safe immunometabolic tool.
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