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.
Vitamin D promotes calcium absorption, and it is needed for bone growth. It also has a positive role in the function of the immune system and reduces inflammation. Women aged 19 to 70, pregnant or nursing are required to get 600 international units, or 15 micrograms, of vitamin D.