Background & aims: The COVID-19 infection can lead to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), mainly affecting patients aged 60 and older. Preliminary data suggest that the nutritional status can change the course of the infection, and on the matter, zinc is crucial for growth, development, and the maintenance of immune function. In the absence of treatment for this virus, there is an urgent need to find alternative methods that can contribute to control of disease. The aim of this paper is to establish the relation between zinc and COVID-19. Methods and results: From the prior scientific knowledge, we have performed a review of the literature and examine the role of zinc in immune function in the infection by COVID-19. Our findings are that the zinc as an anti-inflammatory agent may help to optimize immune function and reduce the risk of infection. Conclusions: Zinc supplementation can be a useful strategy to reduce the global burden of infection in the elderly, there is a need the increased reporting to improve our understanding of COVID-19 and the care of affected patients.

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Maternal intake of soybeans in lactation changes the lipid content of breast milk and programmed offspring for phenotype of the lower metabolic risk, with lower serum TC and LDL, and seems to protect the progeny of alterations in glucose metabolism despite the higher lipid content. The difference in fat content of breast milk and the higher isoflavones content of soy diet are possible imprinting factors that could program the offspring.

Kefir is a traditional fermented milk associated with several health benefits, such as immune system modulation, as well as antimicrobial, antitumor and antioxidant activity. The aim of the current study was to investigate the microbial dynamics of kefir production based on high-throughput DNA sequencing. Results of sequence analysis have grouped the reads into 303 and 112 amplicon sequence variants (ASV) for bacteria and fungi, respectively. Firmicutes, Bacteroidetes and Proteobacteria were the prevalent bacterial phyla, whereas Lactococcus was the prevalent bacterial genus. Ascomycota was the main fungal phylum. Data have shown heterogeneity in diversity and abundance distributions between milk kefir samples.

Objective. To assess the clinical efficacy of flavonoid supplements on allergic diseases. Design. Systematic review. Data Sources. MEDLINE/PubMed, Scopus, Web of Science, and Embase databases were searched from inception to September 2021. Eligibility Criteria for Selecting Studies. Eligible study designs were randomized controlled trials that investigated the effect of flavonoids applied to allergic diseases. Results. This review included 15 randomized controlled trials, including allergic rhinitis/cedar pollinosis ( n = 10 ), asthma ( n = 3 ), and atopic dermatitis ( n = 2 ). A total of 990 participants aged 6 to 69 years were included in these studies. Globally, 12 studies (80%) revealed some benefits of flavonoids (isolate or combined with other compounds) in allergic patients, while three studies (20%) reported no statistically significant impact on symptom scores and/or lung function. No severe adverse events related to treatment were reported. According to the GRADE system, the outcomes evaluated were of low to moderate quality of evidence. Conclusions. Overall, this review suggests that the administration of flavonoids may provide a viable strategy for mitigating allergic symptoms. Future trials with high methodological quality are needed to establish definitive conclusions. This trial is registered with PROSPERO registration no. CRD42021237403.

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Non-nutritive sweeteners (NNSs) gained attention as dietary tools that provide a free sweet taste of energy to foods. However, its health benefits have been questioned. The aim of this review is to present and discuss the effects of NNSs on energy and glycemic homeostasis, as well as the mechanisms involved. Recent studies in animals and humans have shown that consumption of NNSs appears to have a negative effect on the energy and glycemic homeostasis, promoting body weight gain, insulin resistance, and hyperglycemia. The hypotheses proposed to explain these effects are changes in the perception of taste sweet and weakening of the cephalic response, interaction of NNSs with sweet-taste receptors in the intestinal tract, and changes in intestinal microbiota. However, the determinants of energy and glucose homeostasis are diverse, which may explain in part the unclear effects evidenced in many studies. Therefore, other studies are important to clarify the conflicts between the safety of NNSs and metabolic disorders.

Epidemiological and experimental studies have and continue to offer valuable insight into the Developmental Origins of Health and Disease (DOHaD) hypothesis, which emphasizes the importance of early-life nutritional and environmental changes on the increased risk of metabolic diseases in later life. It is now known that non-communicable chronic diseases that were previously associated with lifestyle and genetics have their origins early in life. It is well established that early life environmental signals, including nutrition, set the stage for long-term health and disease risk—effects that span multiple generations. This relationship began still in the intrauterine period and extends throughout the critical period of development. Many types of nutritional challenges including caloric restriction, macronutrient excess, and micronutrient insufficiencies have been shown to induce early life adaptations that produce long-term dysfunction. Several pathways have been suggested to underpin these associations, including epigenetic reprogramming of germ cells. While the mechanisms still remain to be fully investigated, the relationship of nutrition factors in early life and metabolic diseases are clear. This chapter focuses on the role that the nutrition presents during critical periods of development and its repercussions into adulthood.