According to Prevention magazine these next three Super Foods make the list because they help reduce blood Sugar. #4 Blueberries, #5 Lentils and #6 Cinnamon.
Prevention notes that a BMJ review found that adults who ate blueberries had up to 26% lower risk of type 2 diabetes. They are know to be naturally sweet while being low in sugar. Additional information obtained on PubMed.gov that the Phenolic compounds have a high antioxidant capacity as well and some clinical studies suggest Blueberries show promise as effective anti-cancer agents. (23387969)
Lentils is a form of Legume and is known to be high in fiber which slows the body's process of turning carbohydrates into glucose thus preventing a spike in blood sugar levels. Add them into salads or tacos for a filling meal. On PubMed.gov they are noted as a good source of bioactive phenolic compounds and supports low GI (28959813). Additional health benefits include anti carcinogenic, anti-thrombotic, anti-ulcer, anti-atherogenic, anti-inflammatory along with many other health benefits (28941672).
Prevention notes that Cinnamon research indicates 1/2 tsp. of cinnamon daily can make our cells more sensitive to insulin. When conducting my research on PubMed.gov there were no conclusive studies on humans to support this statement. The studies on animals has shown positive results but not enough studies have been conducted on humans to be conclusive (22007625). I did look at several different abstracts on this spice and they all basically came to the same conclusion.
To find each of these abstracts go to: https://www.ncbi.nlm.nih.go/pubmed/(type in the # from the parenthesis).