Peppermint, a source of small amounts of menthol, is believed to work by acting on receptors in the nasal mucous membranes, leading to a reduction of nasal stuffiness. Eucalyptus oil is often used in a steam inhalation to help clear nasal and sinus congestion.
Vitamin D is essential for maintenance of bone mineralization through the regulation of calcium and phosphorus homeostasis. Vitamin D also exhibits many non-skeletal effects, particularly on the immune, endocrine, and cardiovascular systems.
Because calcium is one of the nutrients that helps trigger muscle contractions, without vitamin D to supply its transportation, your heart would not beat, you could not speak, move, breath or digest your food. Vitamin D also supports your immune system to help you fight infection and plays a role in brain development.