The paper presents and influence of various fats and feed additives on production results in Lohmann Brown laying hens (cage production system) and physico-chemical parameters of the eggs. An introduction of supplementary mixture based on rapeseed oil, glycerol, dried lucerne and humic preparation to hens diet results in some improvement in physical egg shell properties such as thickness and strength. An introduction of an addition of linseed oil, fish oil, dried lucerne and humic preparations in turn, profitably affects fatty acids profile (increased ALA and DHA) as well as A and E vitamins content in yolk, however to a limited degree since it may deteriorate taste and flavor of the eggs.

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