Some of the most heavily marketed drinks around the world are sodas, ranging from your average cola to flavored colas to fruity colas. Their sweet sugary taste is irresistible for some, adding to their addictive quality. Unfortunately, sodas are perhaps the most unhealthy drink, besides alcohol. With the rise of obesity and diabetes around the world, sodas are taking a lot of blame. A new study from Cleveland Clinic’s Wellness Institute and Harvard University has found that sodas also contribute to the risk of stroke. This also includes low-calorie soda.