Lemons have a very tart finish and act as a flavor catalyst for your taste buds. Although lemons and limes may not be what you would choose for an afternoon snack, they are considered essentials when we want to bring out the flavor of other foods. While most lemons are tart, acidic and astringent, they are also surprisingly refreshing. One of the tricks to finding a good quality lemon is to find one that is rather thin-skinned since those with thicker peels will have less flesh and therefore be less juicy. Therefore, choose lemons that are heavy for their size. They should be fully yellow in color as those that have green tinges will be more acidic due to the fact that they have not fully ripened.