A) most of them are synthesized by intestinal bacteria. B) intestinal transport occurs by way of the portal circulation. C) deficiency symptoms may take years to develop on a poor diet. D) toxicity risk is higher for vitamins E and K than for other fat-soluble vitamins. deficiency symptoms may take years to develop on a poor diet. 2. Water soluble (e.g., B complex group and vitamin C) Fat-soluble vitamins. Vitamins A, D, E, K. Associated with fat during digestion and absorption. Storage in liver, adipose tissue, and excess storage can be toxic for some vitamins (e.g., A and D) No daily need. Deficiency is very slow. Water-soluble vitamins. Skin color. The darker your skin, the less vitamin D you make from sunlight exposure. For example, African Americans and Hispanic people tend to have lower vitamin D levels. Weight. A body mass Vitamin E is a major lipid-soluble antioxidant obtained exclusively from the diet. It was discovered in the 1920s as an essential dietary element required by rats for reproduction.[1] There are approximately eight different vitamin E-related molecules, but the dominant molecule in humans is alpha-tocopherol. Tocotrienols are the other molecules that are widely studied for vitamin E Also read about the water soluble vitamins: Vitamin B-Complex and Vitamin C. Why we need A D E K. A D E K are the fat soluble vitamins. In other words, they are insoluble in water and therefore are carried in the body through fats. One of the factors that make these group of vitamins handy is that cooking does not make them less potent. Ch 9 A Closer Look: Trace Minerals and Their Deficiency Symptoms. 8 terms. efarinha. Fat-soluble vitamins are required _____ for digestion and absorption. Symptoms and Signs of Vitamin A Toxicity. Although symptoms of vitamin A toxicity may vary, headache and rash usually develop during acute or chronic toxicity. Acute toxicity causes increased intracranial pressure. Drowsiness, irritability, abdominal pain, nausea, and vomiting are common. Sometimes the skin subsequently peels. Study with Quizlet and memorize flashcards containing terms like Which of the following vitamins are fat soluble? A. vitamins B, C, and E B. Vitamins B, C, D, and E C. vitamins A, C, E, and K D. Vitamins A, D, E, and K, Which of the following describes fat-soluble vitamins? A. They include thiamin, vitamin A, and vitamin K B. They cannot be stores to any great extent and so must be consumed The fat-soluble vitamins, A, D, E, and K, are stored in the body for long periods of time and generally pose a greater risk for toxicity when consumed in excess than water-soluble vitamins. Eating a normal, well-balanced diet will not lead to toxicity in otherwise healthy individuals. However, taking vitamin supplements that contain megadoses Vitamin K. Menadione; Menaphthone; Menaquinone; Phylloquinone. Vitamin K is a fat-soluble vitamin, so your body stores it in fat tissue and the liver. It is best known for its role in helping blood clot, or coagulate, properly. The "K" comes from its German name, Koagulationsvitamin. Vitamin K also plays an important role in bone health. I5L9dnu.