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.
The main function of vitamin D is to increase the intestinal absorption of calcium-a process that is crucial for good bone health. Vitamin D also helps strengthen the immune system and aids cell to cell communication in the body.