Browsing by Subject "Vitamin K"

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    Exploring the link between fat-soluble vitamins and aging-associated immune system status: a literature review
    (2025) Schmieder, Hendrik; Leischner, Christian; Piotrowsky, Alban; Marongiu, Luigi; Venturelli, Sascha; Burkard, Markus; Schmieder, Hendrik; Department of Nutritional Biochemistry, University of Hohenheim, Garbenstraße 30, 70599, Stuttgart, Germany; Leischner, Christian; Department of Nutritional Biochemistry, University of Hohenheim, Garbenstraße 30, 70599, Stuttgart, Germany; Piotrowsky, Alban; Department of Nutritional Biochemistry, University of Hohenheim, Garbenstraße 30, 70599, Stuttgart, Germany; Marongiu, Luigi; Department of Nutritional Biochemistry, University of Hohenheim, Garbenstraße 30, 70599, Stuttgart, Germany; Venturelli, Sascha; Department of Nutritional Biochemistry, University of Hohenheim, Garbenstraße 30, 70599, Stuttgart, Germany; Burkard, Markus; Department of Nutritional Biochemistry, University of Hohenheim, Garbenstraße 30, 70599, Stuttgart, Germany
    The importance of vitamin D for a well-functioning immune system is becoming increasingly evident. Nevertheless, the other fat-soluble vitamins A, E and K also seem to play a central role regarding the adequate function of immune cells and to counteract excessive immune reactions and inflammatory processes. However, recognizing hidden hunger, particularly micronutrient deficiencies in vulnerable groups like the elderly, is crucial because older adults often lack sufficient micronutrients for various reasons. This review summarizes the latest findings on the immune modulating functions of fat-soluble vitamins in a physiological and pathophysiological context, provides a graphical comparison of the Recommended Daily Allowances between Deutschland, Austria, Confoederatio Helvetica (D-A-CH; eng. GSA, Germany, Switzerland, Austria), Deutsche Gesellschaft für Ernährung (DGE; eng. German Nutrition Society) and National Institutes of Health (NIH) across all age groups and, in particular, addresses the question regarding the benefits of supplementation of the respective micronutrients for the aging population of industrialized nations to strengthen the immune system. The following review highlights the importance of fat-soluble vitamins A, D, E and K which play critical roles in maintaining immune system function and, in some cases, in preventing excessive immune activation. Therefore, a better understanding of the relevance of adequate blood levels and consequently potential supplementation strategies may contribute to the prevention and management of infectious diseases as well as better overall health of the elderly.