Using black tea in one’s hair care regimen promotes not only growth, but also adds to the shine and the color of the hair due to the natural darkish color of tea. Approximately 5-6 grams (enough for around 3 cups of made tea) of black tea should be added to 6 cups of boiling water and then be left to combine for about an hour at room temperature. After this mixture should be poured on one’s hair and then wrap the head for about and hour or little more before thorough rinsing. As can be seen from the number of reasons provided, black tea is extremely beneficial for your health, hair and skin. But just like anything else, even good things in excess can be harmful and it is advisable to drink black tea in moderation as large doses can cause side effects like digestive problems, varicose veins, insomnia, acidity, palpitations and similar other problems.