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.
There are four main types of tea: green tea, black tea, oolong tea (pronounced wu-long) and white tea. There are even more varieties, including flavored, scented and herbal infusions, but for the sake of simplicity we'll focus on the big four right now.