Scientists have now found out that it is the quality of coffee and the way it is brewed that holds the key to our health. Elderly people on the Greek island of Ikaria, live longer than normal. Among other things, this is linked to the consumption of a strong brew of coffee. Experts also point out that different roasts and types of coffee beans have different effects on our health. Milk and sugar change the different levels of caffeine in a cup of coffee.