Dekristol 20000 IE is a dietary supplement that contains a high dose of vitamin D, specifically 20,000 international units (IE) per capsule. It is often used to treat or prevent vitamin D deficiency, which can impact bone health and immune function. This supplement is typically recommended for individuals with low levels of vitamin D or those at risk of deficiency, such as people with limited sun exposure or certain health conditions. Always consult a healthcare professional before starting any new supplement regimen.