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 Tea? True tea is made from the leaves of an Asian evergreen known as Camellia sinensis. White tea, green tea, oolong tea, and black tea all come from this plant, and all contain caffeine. Our herb teas are made from other, unrelated plants and do not have any caffeine. One exception is Yerba MatÃ©, an herb tea that does contain caffeine.