Calcium Deficiency in Diet Decreases the Magnesium Content in Bone and Affects Femur Physicochemical Properties in Growing Rats

Structural characterisation of deer sinew peptides as calcium carriers, their promotion of MC3T3-E1 cell proliferation and their effect on bone deposition in mice

“…It has also been shown that in most cases, the diet does not alter macrostructural characteristics such as femur length. 53 As shown in Fig. 5G and H, the femoral shaft weight and bone calcium content in the LC group were significantly lower than those in the NC group ( P < 0.05).…”

Low Ca diet leads to increased Ca retention by changing the gut flora and ileal pH value in laying hens

“…Dietary Ca deficiency improves the Ca retention or absorption in both mammals ( Centeno et al., 2009 ; Hernandez-Becerra et al., 2020 ; Rott et al., 2022 ) and birds ( Gilbert, 1983 ; Gautier et al., 2017 ), which is adaptively required for maintaining blood Ca concentration. The current results also showed that the Ca retention ratio was up from 53.12% to 74.88% when the dietary Ca content went from 3.7% down to 2%, which meant that most Ca was compensatively absorbed in hens fed the low Ca diet.…”

“…On the other hand, to meet pathophysiological demands, Ca absorption is notably increased with a decrease in the amount of dietary Ca in mammals ( Centeno et al., 2009 ). Generally, the Ca absorption ratio is about 40% for humans, but the absorption efficiency is increased to over 50% when dietary Ca is below 50% of the normal amount ( Hernandez-Becerra et al., 2020 ). In birds, the index of Ca retention has been used for evaluating Ca resorption efficiency instead of Ca absorption as urine and feces are mixed in the cloaca and excreted together.…”

Calcium Bioavailability in the Soluble and Insoluble Fibers Extracted from Opuntia ficus indica at Different Maturity Stages in Growing Rats

“…The trabecular separation (Tb.Sp), trabecular thickness (Tb.Th), and cortical thickness (Ct.Wi) in femoral bones were determined by scanning electron microscopy (Jeol JSM 6060LV, Tokyo, Japan), as previously described [ 14 , 20 ]. Briefly, the regions of interest for bone quality assessment were selected as follows: Ct.Wi was measured in the femoral cortical bone at the level of the distal metaphysis; Tb.Sp and Tb.Th were measured in the proximal epiphysis near the epiphyseal growth plate within the same microscope field.…”