Yarrow helps sensitive people be less affected by other people’s moods and less-than-harmonious environments. It sets boundaries for those who are empathetic and the person who picks up on other people’s issues and is deeply affected by them. Sometimes what is labeled as a mental or social disorder is actually just extreme sensitivity to environmental and energetic conditions. In these cases, Yarrow can be beneficial. It may also strengthen those who have other conditions relating to their environment.