University:
California State University, Northridge
Course:
FCS 321/L | Contemporary Issues in Foods and Nutrition and Lab
Academic year:

2024
Views:

179

Pages:

13
Author:

hernomenvxp

Selenium What is Selenium(Se)? u u Trace element u Found in nearly all soil and some natural water sources. u Exists in two main forms: organic and inorganic u Can be toxic or beneficial depending on daily intake Essential nutrient u Some essential health benefits include: hormone production, fertility, proper growth and detoxification. u Not manufactured by the body and must be consumed. u Selenium is naturally occurring in plant and animal food sources. Food sources Brazil Nut Mustard Seed Food sources Food Servings size (mcg) 5 each 340 Oysters(cooked) 75 g 116 Liver (lamb, chicken, turkey) cooked 75 g 51-87 75 g 45-53 Cooked eggs 2 each 34 Tofu 150 g 12-30 Greek yogurt 249 mL 14-27 Bacon strips 3 slices (24 g) 12 Mustard seeds 4g 8.32 Brazil nuts (w/out shell) Tuna (canned, light) Forms that exist in the body.. u ...include: Biological Functions u 35 Selenoproteins have been identified in the human body u u 3 well studied, hormone-related selenoproteins include: u Glutathione peroxidase u Iodothyronine deiodinase u Thioredoxin reductase Each regulate the production of thyroxin in the thyroid gland with the addition of regulating other major functions but not limited to: u Detoxification u Regulating DNA replication u Fertility Amazing Abilities of Se u u Fighting Cancer u Inhibits replication of some tumor cells u Detoxes carcinogenic substances that affect normal DNA replication HIV u Low serum selenium levels have been observed with some HIV patients u Slows the rate of the diseases progression Toxicity Alopecia Hyperthyroidism Skin rash Nail dystrophy Gastrointestinal upset • Neurological dysfunction • Disorientation • • • • • vs. Deficiency • • • • • • • • Alopecia Bone and Joint Hypothyroidism Risk for autoimmune disease Increase Risk for Cancer Infertility Immune deficiency Increase effects of oxidative stress Kashin-Becks Disease The Future of Se Supply u Geological Survey and Se supply u Recycle it of organic matter u Agronomic biofortification strategies “Selenium in higher plants: understanding mechanisms for biofortification and phytoremediation,”

Selenium