Hemps hearts are shelled hemp seeds. Whether you inhaled or not during high school or university, you do not need to worry about getting a buzz from these seeds – there is no active “buzz” generating ingredients!
According to Wikipedia, hempseed is usually very safe for those unable to tolerate nuts, gluten, lactose, and sugar. Hempseeds are a great way to get an ideal ratio of Omega-6 to Omega-3‘s, they are high in protein and have a good amount of fibre.
I think they taste like soft sunflower seeds. They have an almost creamy consistency which varies depending on the brand.