Film Industry. Statistics and facts about the film industry Entertainment is big business in the United States. It is expected, that the sector as a whole will have generated 564 billion U.S. dollars in revenue by the end of 2014.
1 Vitamins B-please see Vitamin B group for details. 2  Vitamin C is very important for the immune system, adrenal glands and the manufacturing of connective tissue and detoxification of drugs and chemicals. 3  A deficiency in this vitamin leads to tiredness and a less effective immune system. Without this mineral, you can become very fatigued. 2  Zinc is an important mineral which regulates inflammation, protects against toxic exposure, de-toxifies foreign chemicals and helps with digestion. 3  Without it, you can suffer from: depression, lethargy, fatigue, frequent infections, irritability and muscle fatigue.
Of these vitamins, the B vitamins are best studied. While some studies found that certain vitamins may help improve the quality of sleep, other studies found that certain vitamin combinations can promote insomnia. Generally, there are 2 ways that B vitamins may affect sleep. First, some B vitamins are needed for the syntheses and release of certain neurotransmitters and neurohormones that are involved in the regulation of sleep and the circadian cycle. For example, studies show that certain B vitamins are used as cofactors in the enzymatic synthesis of serotonin (a neurotransmitter).