Influence of bovine and caprine casein phosphopeptides differing in alphas1-casein content in determining the absorption of calcium from bovine and caprine calcium-fortified milks in rats.

Bovine and caprine milks have a similar overall gross composition, but vary considerably in the ratios of their casein components. These differences cause significant changes in the ability of caseins to bind and stabilize calcium (Ca). It might be expected that these in vitro variations, which are thought to be due to differences in casein phosphopeptides (CPP) content, could lead to in vivo differences in the digestion and absorption of Ca.

Ontogeny and dietary modulation of 3-hydroxy-3-methylglutaryl-CoA reductase activities in neonatal pigs.

The development of hepatic and ileal -hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase was studied in three types of young pigs crossbred, obese, and lean pigs). Pigs were fed one of two diets: a high-fat (coconut oil), high-cholesterol 1.0%; designated HC) diet or a high-fat, noncholesterol (designated NC) diet from postpartum d 3 to d 13, 25, and 42 (crossbred only).

Dietary cholesterol supplementation improves growth and behavioral response of pigs selected for genetically high and low serum cholesterol.

We hypothesized that, in pigs selected for low (L) or high (H) serum cholesterol for four generations, neonatal endogenous cholesterol synthesis would be sufficient to meet requirements for brain and body growth. In Experiment 1, eight 16-wk-old L pigs received a diet with or without 200 mg cholesterol/100 g diet for 35 d. Supplemented pigs grew approximately 25% faster and had a significantly greater concentration of free cholesterol in the cerebrum.