Review Selenium and Nano-Selenium Biofortification for Human Health: Opportunities and Challenges Hassan El-Ramady 1 , Salah E.-D. Faizy 1, Neama Abdalla 2, Hussein Taha 2, Éva Domokos-Szabolcsy 3, Miklós Fari 3, Tamer Elsakhawy 4 , Alaa El-Dein Omara 4, Tarek Shalaby 5,6, Yousry Bayoumi 5, Said Shehata 7, Christoph-Martin Geilfus 8 and Eric C. Brevik 9,* 1 Soil and Water Department, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt;
[email protected] (H.E.-R.);
[email protected] (S.E.-D.F.) 2 Plant Biotechnology Department, Genetic Engineering Division, National Research Center, Cairo 12622, Egypt;
[email protected] (N.A.);
[email protected] (H.T.) 3 Agricultural Botany, Crop Physiology and Biotechnology Department, Debrecen University, Böszörményi u. 138., H-4032 Debrecen, Hungary;
[email protected] (E.D.-S.);
[email protected] (M.F.) 4 Agriculture Microbiology Department, Soil, Water and Environment Research Institute (SWERI), Sakha Agricultural Research Station, Agriculture Research Center (ARC), Kafr El-Sheikh 33717, Egypt;
[email protected] (T.E.);
[email protected] (A.E.-D.O.) 5 Horticulture Department, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt;
[email protected] (T.S.);
[email protected] (Y.B.) 6 Arid Land Agriculture Department, College of Agricultural and Food Sciences, King Faisal University, 31982 Al-Hasa, Saudi Arabia 7 Vegetable Crops Department, Faculty of Agriculture, Cairo University, Giza 12613, Egypt;