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Entomophagy is not a new phenomenon in the world. Moreover, it is a traditional diet in a large part of the planet. However, in the European framework it belongs to the category of novel food and although the topic is often debated, it represents a growing choice in human and animal nutrition. Edible insects have the potential to serve as a healthy, sustainable alternative to animal protein sources due to their valuable nutritional composition. They may have superior health benefits based on high levels of essential amino acids, omega-3 and omega-6 fatty acids, vitamin B12, iron, zinc, fibre and antioxidants. They could offer a myriad of environmental benefits, including overall reductions in greenhouse gas emissions and reduced use of agricultural land and water. Future research should aim to understand the beneficial effects of whole insects or insect isolates compared to traditional foods of animal and plant origin. Although insects have the potential to be used as meat substitutes or dietary supplements, leading to benefits for human health and the environment, this paper does not aim to ultimately propagate their use, but to point out their advantages and qualities, as well as potential dangers and risks, and finally to present ways of placing insects on the European market. [ABSTRACT FROM AUTHOR]

Yeast and yeast derivatives are used as nutrients and as feed additives. Live yeast cells (LYC) (Saccharomyces cerevisiae) belong to a group of potent microorganisms that are used as an additive in animal feed and represent an alternative to antibiotics that until recently were used in animal nutrition as growth stimulators. The role of yeast as a growth promoter is due mainly to mannanoligosaccharide and β-glucans, isolated from the outer cell wall of yeast, whose role is known in stimulating the body's immune response. Dietary supplementation with whole yeast or yeast cell wall at 1.0-1.5 g/kg can improve growth performance, improve digestion and absorption of nutrients by modulating gut structure, inhibiting pathogenic bacteria and lowering gut pH. [ABSTRACT FROM AUTHOR]

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Today, a few differing sources of selenium (Se), i.e. inorganic, organic, and nano forms of Se, are used as feed supplements for poultry. Published research indicates that nano-Se and organic Se possess comparable efficiency to inorganic Se in increasing GSH-Px activity of plasma and various tissues, but they deposit at higher rates in various tissues. However, there are principal differences in absorption mechanisms, metabolism, and efficiency of these three forms of Se. The aim of this review was to analyze the available literature on the effects of different Se sources and levels in the diet on glutathione peroxidase (GSH-Px) activity, tissue Se distribution and growth performance in poultry. Higher levels of Se increase GSH-Px activity in the body, but this reaches a plateau even if Se concentrations in diet increase further, while the deposition of Se in tissues increases as Se content in diet increases. In addition, many studies have shown the positive effects of adding Se to diet on growth performance in poultry. Optimal Se supplementation is necessary not only for good poultry health but also to ensure and preserve meat quality during storage and to provide human beings with this microelement. [ABSTRACT FROM AUTHOR]

The aim of this experiment was to investigate the effects of benzoic acid and chelates in which copper (Cu), zinc (Zn) and manganese (Mn) were bound to methionine hydroxy analogue on growth performance, intestinal morphology, intestinal microbiota and digesta pH value of post-weaning piglets at 28 days of age. The experiment was conducted on 96 piglets randomly assigned to one of four treatments (6 replicate pens of 4 piglets each): 1) control (C) – microminerals were provided as sulfates of Cu, Zn and Mn at 130 (80 at second phase), 100, 120 mg/kg in the first phase, respectively; 2) chelates (CTM), microelements were provided as chelates of Cu, Zn and Mn at 130 (80 in second phase), 60, 60 mg/kg in the first phase, respectively; 3) benzoic acid (BA), with the addition of 2500 mg/kg during both periods; 4) chelates + benzoic acid (CTM + BA), microelements were provided as chelates of Cu, Zn and Mn at 130 (80 in second phase), 60, 60 mg/kg in the first phase, respectively, and 2500 mg/kg of benzoic acid during both periods. Results showed that chelates and benzoic acid supplementation not only improved the final body weight (p<0.05), average daily gain (p<0.05) and feed conversion ratio (p<0.05), but also increased the morphology performance and decreased the number of E. coli in the jejunum and ileum in the treated groups (p<0.05). This study provides the evidence that dietary supplementation has beneficial effects on the intestinal morphology and microflora of weaned pigs, which can partly explain why growth performance of the piglets was improved. [ABSTRACT FROM AUTHOR]