The «gratitude visit,» in which the participant wrote down and recited an essay of gratitude to a «kind» person in his or her life, caused an immediate spike in happiness, but after a month the effect was gone. (discovermagazine.com)
When you eat a food that's high on the glycemic index, that contains a lot of easily digestible carbs or refined flours and sugar, we get this immediate spike in blood sugar, as those sugars are absorbed directly into our blood stream. (taliand.com)
Fruit juices don't work as well because they mainly contain fructose, which will not cause an immediate spike in insulin which is needed. (theathleticbuild.com)