CONCLUSIONS Cows fed the acidogenic diets had increased urinary loss of Ca, which was not associated with Ca intake. Reabsorption of Ca from urinary filtrate is mediated by the transient receptor potential cation channel subfamily V member 5 (TRPV5) in the apical lumen of the distal convoluted tubules of the nephron (WoudenbergVrenken et al., 2009). Tubular acidosis induced by acidogenic diet increases iCa and proton flux through the filtrate, which reduces uptake of iCa by TRPV5, resulting in increased urinary loss of Ca (Yeh et al., 2003). On the other hand, urinary losses of Na, K, S, and Cl were all linearly related to dietary intake of those minerals, although the relationship between the intake of net Eq of DCAD and the excretion of net Eq of SID in urine resulted in 2 distinctive clusters, one comprising of cows fed diets that induced metabolic acidosis and one fed alkalogenic diets.