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.
Melatonin levels rise naturally during the night, helping promote sleep, and are suppressed during the day, allowing us to be alert and wakeful. Calcium, like magnesium and potassium, is also a natural relaxant in the body. Dairy products are rich in calcium, and can be a good choice for a sleep-friendly evening snack.