Effect of Vitamin D on the Utilization of Beryllium, Magnesium, Calcium, Strontium and Barium in the Chick

A LITERATURE REVIEW OF $sup 65$Zn IN BIRDS WITH SPECIAL REFERENCE TO THE MALLARD.

“…Vitamin D Gross effects of vitamin D in zinc metabolism of the chick have been revealed (Martin and Patrick, 1961;Worker and Migicovsky, 1961;Kienholz et al, 1964). These workers have reported most extensively on influences of vitamin D on zinc concentrations in bone tissue.…”

“…Zn movement into bone tissue of rachitic chicks was found markedly increased by vitamin D (Worker and Migicovsky, 1961). Kienholz et al (1964) found zinc levels in bone to be greater in hens fed higher concentrations (1000 IU/kg) of vitamin D than in hens fed a lesser amount (150 IU/kg).…”

“…They also noted 65 Zn in the tibia increased in the presence of 1.6% calcium. Worker and Migicovsky (1961) believed competition might exist between divalent ions in the presence of vitamin D. Zinc absorption as influenced by the vitamin may reflect the presence of other divalent ions. However, since a small percentage of zinc is absorbed from the G.I.…”

“…However, since a small percentage of zinc is absorbed from the G.I. tract, zinc availability probably is not affected except under vitamin D deficient conditions (Worker and Migicovsky, 1961) .…”

Fat-Soluble Vitamins

“…Phosphate absorption was only slightly enhanced by vitamin D, more markedly, however, when administered combined with calcium. Vitamin D3 has a positive effect on the absorption of cations other'than calcium, especi ally on those of the alkaline earth group (70,71,72).…”