Are red osier dogwood berries poisonous to humans?

Red osier dogwood berries (Cornus sericea) are not considered poisonous to humans. While they are technically edible, they are often described as having an unpleasant taste and can cause gastrointestinal discomfort if consumed in large quantities. It's best to avoid eating them unless properly prepared. Always consult reliable sources or experts before foraging for wild berries.