Classification methods. Vehicles can be categorized in numerous ways. For example, by means of the body style and the level of commonality in vehicle construction as defined by number of doors and roof treatment (e.g., sedan, convertible, fastback, hatchback) and number of seats that require seat belts to meet safety regulations.
Keeping a diary of food consumed, physical and mental feelings each day, and physical activity will aid in discovering specific reasons for allergic reactions. Caffeine allergy symptoms can be as subtle as tingling in the mouth, itchy skin, and minor swelling of the throat. People who have these reactions every day may not even notice them. Many alternatives are available to replace caffeinated beverages and foods.
Caffeine sensitivity refers to the amount of caffeine that will produce negative side effects in a particular person. Regular caffeine consumption reduces sensitivity to caffeine, and a higher intake is needed for the same effects. So caffeine is considered to be an addictive drug.