841. Probiotics – Guidelines from the American Gastroenterological Association (AGA) and the European Society for Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN) 842. Is It Really a Problem of Undernutrition? An Analysis of the Consequences 843. Runner’s Hands 844. How to Cope with Human Intestinal Parasites 845. Excess Abdominal Fat Tissue – Description, Causes, Treatment, Diet 846. Vitality for the Lungs 847. Cartilage Damage in the Joint 848. COVID-19 Pandemic and Vitamin D Levels in Children 849. Hip Joint Disorders 850. The French and Inuit Paradox in Cardiovascular Diseases – Do Scientists Have the Answer? 851. Peat Mud Therapy – Properties of Peat Mud 852. Pica – This Disorder Must Not Be Overlooked 853. Chronic Instability of the Ankle Joint 854. Energy Transformations in Our Body 855. Long-Term Effects of Stress on the Body Related to Diet 856. Persistent Lack of Energy – Which Tests Are Worth Doing 857. Muscle Destruction – What Is It? 858. Psychological Factors Influencing Overweight 859. Chronic Reactive Arthritis 860. Posture Correction – Autonomous Bodily Adaptation 861. Natural Revolution: Support for Upper Gastrointestinal Tract Disorders 862. Rebuilding in Strength Training 863. New Year, New Eating Habits – How to Keep Resolutions 864. Reduced Fat Content and Absence of Menstruation 865. From Mild Jalapeños to Fiery Carolina Reaper – The Effects of <i>Capsicum</i> Fruits on Our Health 866. Breathe Deeply! 867. Restoring Biological Balance During Workouts 868. Integrated Resistance in Culinary Art 869. Body Immunity – Its Significance, Mechanisms of Action, and Influencing Factors 870. Dehydration – Causes, Symptoms, Treatment Methods