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.
The researchers found no correlation between tea type (white/green/black) and caffeine content. Yup, thatâs right, no correlation. There are whites with as much caffeine as blacks, blacks with less than greens, backs with more than greens.