The balance between the production of free radicals and antioxidant intake is very important because of the stress that is present in every organism. Human body utilizes better the nutrients from natural sources, i.e. food, then from supplements. Wild berries offer a range of vitamins, minerals and phytochemicals, and the most of them have antioxidant properties. The aim of this work was to examine the berries (strawberries, blackberries, raspberries, blueberries and red currants) and supplements of vitamin C, by determining the share of total phenols (TP) and the antioxidant activity (AOA) using the Briggs-Rauscher's method. In the extraction were used two methods: with reflux and using ultrasound. Also was conducted a colorimetric analysis of the samples. The results indicate the highest concentration of TP in the vitamin C (supplement sample) that had also the smallest AOA. Simple regression models were used to identify if some correlation between the measured variables can be detected. According to such model, the concentration of TP in berries is positively correlated with the AOA expressed as Briggs-Rausher antioxidant activity index. Colorimetric analysis showed that the darker and extracts with domination of blue-green color have more antioxidant power than the lighter and yellow-red samples. The results of t-test and ANOVA showed no significant differences between the sample extraction (p > 0,05).