A study was carried out with laying hens from 50-60 weeks age.to determine the effect of vitamins or mixtures vitamins and minerals (VitM) in powder (P) or aqueous form (W) supplementation into drinking water on egg performance and quality. A total of 3600 Hisex Brown laying hens at 50 weeks of age were distributed in a completely randomized design experiment, with 5 treatments and 3 replicates. Each replicate consisted of a line with 60 pens (4 birds/pen). The experimental data were collected for 10 weeks. Treatments were: Basal diet (Cont); vitamins in powder form (VitP); vitamins in aqueous form (VitW); vitamins and minerals in powder form; Vit/MP); vitamins and minerals in aqueous form (Vit/MW. All supplements were supplied in drinking water at 2g/liter (P) or 2ml/liter (W). The average daily feed intake was not affected by vitamins or mixture of vitamins and minerals. Egg production and feed conversion were better when vitamins were given in in aqueous form and for combined vitamins and minerals. The combined supplements supported higher proportion of double yolk eggs, fewer broken eggs and egg yolks with more pronounced yellowness compared with the control group. It is concluded that supplementation of vitamins or mixture of vitamins and minerals in aqueous form into drinking water could improve egg production, egg shell thickness, and egg yolk color.