[Dynamics of several parameters of microelement metabolism, vitamin C intake and physical work capacity of forge workers during the course of the year]

Measurements of minerals and vitamins in forge workers throughout the year revealed that in autumn and winter blood levels of iron, hemoglobin, the activity of peroxidase and ceruloplasmin, dietary levels of iron, copper and manganese were higher than in spring and summer. Iron and copper metabolism was closely related to total protein in the serum and vitamin provision. Muscular performance of the forge workers was found reduced in spring and summer and was correlated with iron and copper metabolism.