An expert has warned that eating habits that were believed to be healthy choices, such as drinking Americano instead of mixed coffee and eating potatoes or sweet potatoes instead of white rice, can actually raise blood sugar levels. Professor Jaehyuk Lee of the Department of Endocrinology at Myongji Hospital appeared on the ‘Foods that Raise Blood Sugar the Fastest’ on ‘Kim Jaewon TV’, a YouTube channel with 550,000 subscribers, on the 10th and said, “In the clinic, I quit mixed coffee and switched to Americano, and even if I ate a lot of potatoes and sweet potatoes instead of rice, my blood sugar level actually increased. “There are quite a few people who suffer from blood sugar bombs,” he said. Professor Lee first pointed out misunderstandings about Americano. He explained, “Americano itself is very low in calories,” but “caffeine has the effect of raising blood sugar levels by stimulating hormones that activate the body, such as cortisol and epinephrine.” He added, “It is much more advantageous than mixed coffee, but it is better to put aside the idea that ‘Americano is completely safe.’” He also said that choosing potatoes or sweet potatoes instead of rice is not safe. He said, “Stew potatoes or sweet potatoes.