A ketogenic diet, regardless of fish oil content, does not affect glucose homeostasis or muscle insulin response in male rats.
Am J Physiol Endocrinol Metab
; 2024 Aug 14.
Article
in En
| MEDLINE
| ID: mdl-39140973
ABSTRACT
Ketogenic diets (KDs) are very high in fat and low in carbohydrates. Evidence supports that KDs improve glucose metabolism in humans and rodents that are obese and/or insulin resistant. Conversely, findings in healthy rodents suggest that KDs may impair glucose homeostasis. Additionally, most experimental KDs are composed of saturated and monounsaturated fatty acids, with almost no omega-3 long-chain polyunsaturated fatty acids (n-3 LCPUFA). Evidence supports a beneficial role for n-3 LCPUFA on glucose homeostasis in the context of a metabolic challenge. To our knowledge, no study has examined whether the inclusion of n-3 LCPUFA affects the impact of a KD on glucose homeostasis. The objective of this study was to examine the impact of a KD on whole-body glucose tolerance and skeletal muscle insulin response in rats, and to determine if increasing the n-3 LCPUFA content in a KD with menhaden oil could improve metabolic outcomes. Male Sprague Dawley rats were pair-fed one of a low-fat diet, high-fat diet, KD, or a KD supplemented with menhaden oil (KDn-3) for 8 weeks. No significant differences in whole-body glucose tolerance, skeletal muscle insulin signaling, or skeletal muscle insulin-stimulated glucose uptake were detected between the dietary groups. Our findings suggest that KD feeding, with or without supplementation of n-3 LCPUFA, does not affect whole-body glucose homeostasis or skeletal muscle insulin response under pair-feeding conditions.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Am J Physiol Endocrinol Metab
Journal subject:
ENDOCRINOLOGIA
/
FISIOLOGIA
/
METABOLISMO
Year:
2024
Type:
Article
Affiliation country:
Canada