Cool, but true: three 'superfoods' with few calories

Would you rather not eat beetroot every day? Then this message is probably more interesting. According to HLN, three foods are designated as 'superfoods' because of their low calories and versatility in dishes.
These are foods that, according to the source, contain so few calories that they can be incorporated into many dishes. Which foods exactly are mentioned is not clear. HLN does not name any names.
Whether the designation 'superfoods' is justified remains unclear. Often this label is given to foods with many nutrients. However, nothing like that is specifically mentioned for these three foods.
This report is a summary based on the mentioned source and is not medical advice. In case of complaints, always consult a doctor or pharmacist.