Dietary fat was recognized as a good source of energy and fat-soluble vitamins by the first part of the 20th century. but fatty acids were not considered to be essential nutrients because they could be synthesized from dietary carbohydrate. This well-established view was challenged in 1929 by George and Mildred Burr who reported that dietary fatty acid was required to prevent a defici... https://macorners.shop/product-category/belt-gift-box/