tokoferoliryhmän

Tokoferoliryhmän, also known as vitamin E, is a group of eight fat-soluble compounds that share a common structure and biological activity. These compounds are tocopherols and tocotrienols, which are classified based on the number and position of methyl groups attached to the chromanol ring. The primary forms of vitamin E are alpha-tocopherol, beta-tocopherol, gamma-tocopherol, and delta-tocopherol. Vitamin E plays a crucial role in maintaining the health of cell membranes, particularly those of red blood cells, and acts as an antioxidant, protecting cells from damage by reactive oxygen species. It is essential for the proper functioning of the immune system and is involved in the metabolism of fats. Vitamin E is found in various foods, including vegetable oils, nuts, seeds, and leafy green vegetables. It is also available in supplement form. Deficiencies in vitamin E are rare, but excessive intake can lead to toxicity, which may cause hemolytic anemia and other health issues. The recommended daily intake of vitamin E varies depending on age and sex, with adults generally requiring between 15 and 30 milligrams per day.