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7-Dehydrocholesterol (7-DHC) is a zoosterol that functions in the serum as a cholesterol precursor, and is photochemically converted to vitamin D 3 in the skin, therefore functioning as provitamin-D 3. The presence of this compound in human skin enables humans to manufacture vitamin D 3 (cholecalciferol).
Foods such as the flesh of fatty fish are good natural sources of vitamin D; there are few other foods where it naturally appears in significant amounts. [2] In the U.S. and other countries, cow's milk and plant-based milk substitutes are fortified with vitamin D 3, as are many breakfast cereals.
Also in 2016, Quizlet launched "Quizlet Live", a real-time online matching game where teams compete to answer all 12 questions correctly without an incorrect answer along the way. [15] In 2017, Quizlet created a premium offering called "Quizlet Go" (later renamed "Quizlet Plus"), with additional features available for paid subscribers.
Oat milk is marketed as an environment-friendly alternative to almond milk. [16] Rice milk is mostly used for baking because of its sweet taste, but in case of a nut or soy allergy a grain milk processed from rice may be preferable. When fortified, this milk can be a source of calcium, vitamin B12, and vitamin D2.
Since Vitamin D is a fat-soluble vitamin, it cannot be added to a wide variety of foods. Foods that it is commonly added to are margarine, vegetable oils and dairy products. [ 34 ] During the late 1800s, after the discovery of curing conditions of scurvy and beriberi had occurred, researchers were aiming to see if the disease, later known as ...
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A glass of cow milk Cows in a rotary milking parlor. Milk is a white liquid food produced by the mammary glands of mammals. It is the primary source of nutrition for young mammals (including breastfed human infants) before they are able to digest solid food. [1] Milk contains many nutrients, including calcium and protein, as well as lactose and ...
Almond milk is a plant-based milk substitute with a watery texture and nutty flavor manufactured from almonds, [1] although some types or brands are flavored in imitation of cow's milk. [2] It does not contain cholesterol or lactose and is low in saturated fat .