New insights into high-fat diets and metabolic disorders -- Cactus stems (opuntia spp.): anti-hyperlipidemic, cholesterol-lowering and other positive health benefit effects -- The importance of dietary fats -- Dietary fat and its impact on health: analysis of basic, clinical and epidemilogical evidence -- The efficacy and safety of low-fat diets in children -- The comparison of lipid profiling in mouse brain and liver after starvation and a high-fat diet: a medical systems biology approach