We will analyze clinical effects of the degree of gingivitis and changes of known biomarkers of inflammation in serum, saliva and gingival fluid. We will start with a low dose and double the dose each week. We have made the assumption that the content dry substance in berries is about 10 %, i.e. 50 g freeze-dried berries would correspond to 500 g fresh berries. We will start with 6.25 g berry powder and double the dosage each week until we reach a maximum dosage of 50 g according to the Swedish National Food Agencies recommendations.