Destruction of Vitamin A by Rancid Fats

The Nutritive Value of Herring Meals

“…The meals listed in this table as stored at 0°C. Lease et al (1938) reported that heating of rancid fats lowered both their peroxide value and their ability to destroy vitamin A. It will be seen that there was little difference between the folic acid content of these meals and that of the meals stored at 21°C.…”

“…Little attention has been paid to the effect of oil content on the nutritive value of these meals. For example, Lease et al (1938) found that rancid fats inactivate vitamin A. Biotin has been reported by Pavcek and Shull (1942) to be similarly inactivated. This oil, because of the temperatures reached in processing and the large surface area exposed in the final product, may be subject to considerable alteration through polymerization and oxidation.…”

Discussion of Paper Entitled, “Wheat Germ Oil in the Control of Fowl Paralysis,” by Erwin Jungherr

“…The Pappenheimer-Goettsch diet contains 21 percent of lard, a fat which readily becomes rancid upon exposure to air. This evidence is supported by the work of Lease, Lease, Weber, and Steenbock (1938) who found that the rat was unable to store vitamin A in the liver when the vitamin was fed in connection with rancid rat. In preliminary experimental work Bauernfeind, Hodson, and Norris* have found that the development of nutritional encephalomalacia in chicks fed the Pappenheimer-Goettsch diet is greatly decreased by feeding soybean oil independently of, but simultaneously with, this diet or by incorporating the antioxidant, anaphthol, in the lard portion of the diet.…”

The Effect of Cottonseed Oil on the Hatchability of Eggs

“…After a bird that had laid was removed from the trapnest she was fed a capsule containing the vitamins, then confined in a coop without feed until the next trapnesting period when she was returned to the pen. An attempt was made to feed the vitamin supplements when the intestine was empty, since Lease et al (1938) …”