Symptoms of a choline deficiency may possibly include: 1  low energy levels of fatigue. 2  memory loss. 3  cognitive decline. 4  learning disabilities. 5  muscle aches. 6  nerve damage. 7  mood changes or disorders.
Black teas are fully oxidized teas. Black teas brew a liquor from reddish brown to dark brown. They are the most popular type of tea in the Western world. Black teas range from 40 â 60 milligrams of caffeine per 8 oz cup.
Earl Grey's Flavor, History, Caffeine Levels, Types & More. Earl Grey tea is one of the most popular teas in the West. This black tea with hints of citrus is a perfect introduction to tea, it is great served hot or cold, and pairs well with food. That's why it is a favorite for afternoon tea and preferred by many tea drinkers throughout the world.