Lactation is a physiological state of hyperprolactinemia and associated amenorrhea. Despite the fact that exact mechanisms standing behind the hypothalamus–pituitary–ovarian axis during lactation are still not clear, a general overview of events leading to amenorrhea may be suggested. Suckling remains the most important stimulus maintaining suppressive effect on ovaries after pregnancy. Breastfeeding is accompanied by high levels of prolactin, which remain higher than normal until the frequency and duration of daily suckling decreases and allows normal menstrual function resumption. Hyperprolactinemia induces the suppression of hypothalamic Kiss1 neurons that directly control the pulsatile release of GnRH. Disruption in the pulsatile manner of GnRH secretion results in a strongly decreased frequency of corresponding LH pulses. Inadequate LH secretion and lack of pre-ovulatory surge inhibit the progression of the follicular phase of a menstrual cycle and result in anovulation and amenorrhea. The main consequences of lactational amenorrhea are connected with fertility issues and increased bone turnover. Provided the fulfillment of all the established conditions of its use, the lactational amenorrhea method (LAM) efficiently protects against pregnancy. Because of its accessibility and lack of additional associated costs, LAM might be especially beneficial in low-income, developing countries, where modern contraception is hard to obtain. Breastfeeding alone is not equal to the LAM method, and therefore, it is not enough to successfully protect against conception. That is why LAM promotion should primarily focus on conditions under which its use is safe and effective. More studies on larger study groups should be conducted to determine and confirm the impact of behavioral factors, like suckling parameters, on the LAM efficacy. Lactational bone loss is a physiologic mechanism that enables providing a sufficient amount of calcium to the newborn. Despite the decline in bone mass during breastfeeding, it rebuilds after weaning and is not associated with a postmenopausal decrease in BMD and osteoporosis risk. Therefore, it should be a matter of concern only for lactating women with additional risk factors or with low BMD before pregnancy. The review summarizes the effect that breastfeeding exerts on the hypothalamus–pituitary axis as well as fertility and bone turnover aspects of lactational amenorrhea. We discuss the possibility of the use of lactation as contraception, along with this method’s prevalence, efficacy, and influencing factors. We also review the literature on the topic of lactational bone loss: its mechanism, severity, and persistence throughout life.

Introduction and Purpose: Iron deficiency alongside anaemia is one of the most significant global health concerns with potentially long-lasting implications on child development and health outcomes. The period of infancy represents a crucial phase of central nervous system maturation, rendering infants particularly susceptible to the adverse effects of iron deficiency. It is therefore crucial to pay close attention to this issue. The aim of this review is to elucidate the neurological implications of iron deficiency in infancy and emphasize the necessity of implementing preventive strategies to safeguard child development. State of Knowledge: Iron deficiency in infancy can result in impairments of brain development. Extensive research highlights the influence of this micronutrient on various physiological processes, including the synthesis of neurotransmitters, neuronal metabolism, myelination, synaptogenesis and gene expression. Furthermore, iron deficiency during infancy is associated with adverse developmental outcomes, including cognitive, motor, and socioemotional deficits. Long-term follow-up studies have elucidated the enduring neurological consequences of iron deficiency in infancy, with effects extending into childhood and beyond. Summary: Given that the changes that occur during the infantile period are often irreversible and have long-lasting implications for future development, it is of the utmost importance to prioritize prevention strategies.

Introduction: Apart from pharmacological treatment, non-pharmacological strategies including physical activity play a significant role in the management of asthma. The aim of this paper is to examine various topics related to swimming and asthma. They include the detailed effect of swimming on asthma control,the potential role of swimming in early childhood asthma development, exercise induced asthma in swimmers as well as the relationship between asthma and cold water swimming. Review methods: This article is based on the literature found in the PubMed Database from the period of 1971-2024 with the use of keywords such as “asthma”, “swimming”, “cold water swimming”, “exercise induced asthma”, “childhood asthma” Description of the state of knowledge: Swimming is a safe form of physical activity for asthma patients.Swimming training enhances aerobic capacity, reduces exercise-induced bronchoconstriction and improves lung function in both pediatric and adult patients. However, there is a concern regarding indoor swimming pools that chlorine can potentially induce airway inflammation. There is research suggesting that early life swimming pool exposure may contribute to the asthma development in atopic children. There is some premise to the thought that cold water swimming may help alleviate asthma symptoms, but it also carries many risks.Swimming is a major cause of exercise induced asthma in professional athletes. Conclusions: Alongside appropriate pharmacological treatment, swimming is a valuable strategy in asthma management in both pediatric and adult asthma patients. The risks of chlorinating pools are still not known to outweigh the benefits of swimming for asthmatics. Further research should be carried out on safety of early swimming in atopic children. Cold water swimming should also be evaluated in terms of safety and potential benefits for asthma patients.

Introduction: Eating disorders are potentially mortal health conditions affecting mostly young people. The reasons for that in general population are connected to vulnerable self-image, following the current beauty standards and co-existing psychiatric comorbidities. Athletes may be in danger of developing a pathological eating pattern due to sport specific reasons such as higher scores related to thinner body. Aim of study: The main aim of the study was to examine the relationship between eating disorders in professional athletes’ population, evaluate causes and risk factors and to assess health consequences to eating disorder in sport. Materials and methods: This article is based on the literature found in PubMed and Google Scholar Database with the use of keywords such as ”eating disorders”, “sport”, “athletes”, “anorexia nervosa in athletes”, “eating disorders in sport”, “disordered eating in sportsmen”, “female athletes”, “bulimia nervosa”, “binge eating”, “ED and sport”, “mental health and sport”, “consequences of eating disorders”, “sport education”. Results: Investigation of available literature revealed the connection between developing eating disorder in professional athlete sample. The reasons behind it are mostly sports’ oriented and connected to the desire to achieve better results and perfectionism. However, developing an eating disorder results in worse sports’ performance, menstrual irregularity, lower bone mineral density, cardiovascular issues and can be potentially mortal. Conclusion: Athletes are in danger of developing eating disorders. There should be a focus on evaluating people in sport in terms of eating patterns, however available questionnaires are inefficient because players tend to underreport their problems. Coaches and families of the athletes need to be educated in the topic as they can recognize dangerous behaviors first.

Introduction and purpose: Polyunsaturated fatty acids (PUFAs) are a well-known component of a nutritionally balanced diet. There is a wealth of evidence demonstrating that the ingestion of these substances enhances health, as they are involved in a multitude of metabolic processes that are essential for cellular functionality. However, the contemporary Western diet is distinguished by a reduction in the consumption of omega-3 polyunsaturated fatty acids (PUFAs). The objective of this review is to present the potential therapeutic efficacy of omega-3 PUFA supplementation in the most common inflammatory skin disorders, such as acne vulgaris, atopic dermatitis and psoriasis vulgaris. State of knowledge: Acne vulgaris, atopic dermatitis and psoriasis vulgaris differ in terms of their pathophysiology. However, they are all characterised by underlying inflammatory processes. Omega-3 fatty acids have been demonstrated to possess anti-inflammatory properties. They are capable of modulating both the innate and the adaptive immune responses, thereby alleviating the symptoms of the aforementioned skin disorders. Summary: Given the pluripotent anti-inflammatory qualities of omega-3 polyunsaturated fatty acids, it is reasonable to conclude that they have the potential to become an effective therapeutic tool in the management of inflammatory skin diseases.

Introduction: Matcha, a finely powdered form of green tea, has recently gained global popularity due to its vibrant green color, distinctive taste, and versatile applications in various food products. Despite its promising nutritional profile, matcha has not received significant attention in the academic community compared to traditional green tea. Purpose of work: The primary objective of this review is to provide a comprehensive overview of the current understanding of matcha's biological properties and its potential health benefits. Methods and materials: A review of the literature available in the PubMed database and Google Scholar, the following keywords were searched: "matcha", “catechin", "EGCG", “cognitive function”, “green tea” State of knowledge: Existing studies have demonstrated that matcha exhibits anticancer properties, enhances cognitive function, improves cardio-metabolic health, and modulates the gut microbiome. Moreover, matcha is known for its anti-inflammatory and antioxidant properties. Summary: This review summarizes the latest research findings on matcha green tea and its potential health benefits. While animal studies have shown promising results, our knowledge of matcha's effects on human health remains limited. Further randomized controlled trials are necessary to fully elucidate its potential health-promoting effects. Therefore, we advocate for continued research into matcha's properties and its integration into dietary practices to promote overall health and well-being.