a native hydrous magnesium silicate, sometimes with a small amount of aluminum silicate; used as a dusting powder. The inhalation of talc is associated with a wide variety of respiratory disorders.
Factors contributing to poor sleep include vitamin and mineral deficiencies. Magnesium deficiency can cause insomnia; lack of potassium can lead to difficulty staying asleep; and vitamin D deficiency has been linked to excessive daytime sleepiness.
Vitamin D acts on the areas of your brain that are linked to depression, but exactly how vitamin D works in your brain isnât yet fully understood. There is a growing amount of research into depression and vitamin D. However, the research in this area has given some mixed results.