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The discovery dates of the vitamins and their sources Year of discovery Vitamin Food source 1913: Vitamin A (Retinol) Cod liver oil: 1910: Vitamin B 1 (Thiamine) Rice bran: 1920: Vitamin C (Ascorbic acid) Citrus, most fresh foods 1920: Vitamin D (Calciferol) Cod liver oil 1920: Vitamin B 2 (Riboflavin) Meat, dairy products, eggs: 1922: Vitamin ...
Vitamin A is found in many foods. [56] Vitamin A in food exists either as preformed retinol – an active form of vitamin A – found in animal liver, dairy and egg products, and some fortified foods, or as provitamin A carotenoids, which are plant pigments digested into vitamin A after consuming carotenoid-rich plant foods, typically in red ...
B-vitamins are primarily found in animal-based foods, making deficiencies more common among those with limited animal food intake due to cultural, religious, or economic reasons. For vegetarians, fortified foods can be a viable alternative to ensure adequate vitamin B12 levels, especially when reducing laxative use to improve absorption.
For precise details about vitamins and mineral contents, the USDA source can be used. [1] To use the tables, click on "show" or "hide" at the far right for each food category. In the Measure column, "t" = teaspoon and "T" = tablespoon. In the food nutrient columns, the letter "t" indicates that only a trace amount is available.
In the United States, foods poor in micronutrient content and high in food energy make up some 27% of daily calorie intake. [3] One US national survey (National Health and Nutrition Examination Survey 2003-2006) found that persons with high sugar intake consumed fewer micronutrients, especially vitamins A, C, and E, and magnesium.
Despite its name, vitamin D is not a vitamin but a hormone or prohormone. An adequate intake of vitamin D may support good immune function and reduce the risk of autoimmune diseases.
The U.S. Food and Drug Administration (FDA) now classifies eggs as a “healthy, nutrient-dense" food, according to a new proposed rule. Registered dietitians react to the change.
The U.S. Food and Drug Administration (FDA) announced a new definition of “healthy” food for the first time in 30 years. The new definition will apply to manufacturers who want to call their ...