Avoid overexposure to air. Store safely out of reach of children. Don't store in bathroom medicine cabinet. Heat and moisture may change action of vitamin. Absence of sunlight prevents natural formation of vitamin D by skin.
Sunshine provides sufficient amounts of vitamin D for people who live in sunny climates.
Those who live in northern areas with fewer days of sunshine and extended periods of cloud cover and darkness must depend on dietary sources for vitamin D. Avoid megadoses. Hospitalization may be necessary. Call doctor when convenient. Call doctor when convenient. Call doctor immediately.