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.
How much caffeine is in a cup of tea? Caffeine is inherent in the tea leaf. There are between 40 and 50 milligrams of caffeine in a typical eight-ounce cup of brewed black tea or green tea steeped for three to five minutes. No decaffeinated tea or coffee is completely caffeine-free.