Very Low Calorie Ketogenic Diet: What Effects on Lipid Metabolism?

PURPOSE OF REVIEW: This review aims to critically examine how VLCKD affects plasma lipoprotein, lipid and cholesterol metabolism. Cardiovascular disease is a worldwide health problem affecting millions of people and leading to high rates of mortality and morbidity. There is a well-established association between cardiovascular disease and circulating cholesterol. Various dietary recommendations are currently available for the management of dyslipidemia. RECENT FINDINGS: The very low-calorie ketogenic diet (VLCKD) is becoming increasingly popular as a treatment option for several pathological conditions, including dyslipidemia. In addition to being low in calories, the VLCKD's main feature is its unique calorie distribution, emphasizing a reduction in carbohydrate consumption in favor of fat as the primary calorie source. Lowering calorie intake through a VLCKD can reduce the endogenous production of cholesterol. However, if the foods consumed are from animal sources, dietary cholesterol intake may increase due to the higher fat content of animal products. When combined, these dietary practices may have opposing effects on plasma cholesterol levels. Studies investigating the impact of VLCKD on plasma cholesterol and low-density lipoprotein cholesterol levels report contradictory findings. While some studies found an increase in low-density lipoprotein cholesterol levels, others showed a decrease in total cholesterol and low-density lipoprotein cholesterol, along with an increase in high-density lipoprotein cholesterol.

[Prevalence of diarrhea in adult patients in intensive care and its relationship with ready-to-use enteral formulas] / Prevalencia de diarrea en pacientes adultos en terapia intensiva y su relación con las fórmulas enterales listas para utilizar

Introduction: Diarrhea is a frequent complication in critically ill patients. Its origin is multifactorial. The objective of this work is to analyze the relationship between 5 ready-to-use formulas and the development of diarrhea in critically ill patients. Methods: Retrospective study where the volume of the stools of 315 patients and the presence of diarrhea defined with a cut-off point of a volume of 250 ml/day were evaluated. 35.34% of the patients presented diarrhea with said cut-off point. The mean volume of stools was 269.20 ml (95% CI: 255.05-283.06). Results: It was observed that all the formulas analyzed had a slight correlation with the Spearman test between the volume provided and the volume of stools, being: Nutricia Nutrison ® (R: 0.159; P: 0.053), Nutricia Multifibra ® (R: 0.296; <0.001), Nutricia Peptisorb ® (R: 0.323; P<0.001), Nutricia Protison ® (R: 0.108; P<0.001), Fresenius Supportan ® (R: 0.152; P<0.001). Multivariate analysis was performed and it was observed that there were no differences in the incidence of diarrhea between the different enteral formulas during the first 10 days. The change of formulas during hospitalization would be a predisposing factor for diarrhea. Conclusion: Therefore, the formula and the volume provided are factors that could influence whether patients have diarrhoea. Understanding these possible influences in a deeper way will allow the safest choice of enteral formulas for a patient with diarrhea.

Introducción: La diarrea es una complicación frecuente en los pacientes críticos. Su origen es multifactorial. El objetivo de este trabajo es analizar la relación entre 5 fórmulas listas para usar y el desarrollo de diarrea en pacientes críticos. Métodos: Estudio retrospectivo donde se evaluó el volumen de las deposiciones de 315 pacientes y la presencia de diarrea definida con un punto de corte con un volumen de 250 ml/día. Resultados: 35.34% de los pacientes presentaron diarrea con dicho punto de corte. El volumen medio de deposiciones fue de 269.20 ml (IC 95%: 255.05-283.06). Se observó que todas las fórmulas analizadas tenían una correlación leve con la prueba de spearman entre el volumen aportado y el volumen de las deposiciones, siendo:  Nutricia Nutrison ® (R: 0.159; P: 0.053), Nutricia Multifibra ® (R: 0.296; <0.001), Nutricia Peptisorb ® (R: 0.323; P<0.001), Nutricia Protison ® (R: 0.108; P<0.001), Fresenius Supportan ® (R: 0.152; P<0.001). Se realizó análisis multivariado y se observó que no hubo diferencias en la incidencia de diarrea entre las distintas fórmulas enterales durante los primeros 10 días. La fibra soluble sería un factor protector en cambio la fibra mixta y semielemental serían factores que aumentan la incidencia de diarrea. Conclusión: Por lo tanto, la fórmula y el volumen aportado son factores que podrían influenciar en que los pacientes tengan diarrea. Entendiendo estas posibles influencias de una manera mas profunda, permitirá elegir las formulas enterales con mas seguridad para un paciente con diarrea.