Peer-reviewed veterinary case report
Ionized high calcium in cats may improve with diet changes
By Ehrlich, Margot R et al.·Published in Journal of Feline Medicine and Surgery·2024·Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA, United States·View original on Crossref →
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Original publication title: Ionized hypercalcemia can resolve with nutritional modification in cats with idiopathic hypercalcemia or chronic kidney disease
- Species:
- cat
Plain-English summary
A group of cats with high calcium levels in their blood (ionized hypercalcemia) were switched to special diets that had less calcium and a better balance of calcium to phosphorus. Most of the cats, nine out of ten, showed a decrease in their calcium levels after about nine weeks, and six of them returned to normal levels. For the cats that still had high calcium, adding chia seeds to their diet helped normalize their calcium levels as well. This suggests that adjusting a cat's diet can be an effective way to manage high calcium levels, especially in cases of idiopathic hypercalcemia or chronic kidney disease.
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Abstract
Case series summary Cats with ionized hypercalcemia that were fed diets with either more than 200 mg calcium per 100 kilocalories (kcal), a calcium:phosphorus (Ca:P) ratio greater than 1.4:1 or both, based on diet history, were included in this case series. Ionized hypercalcemia was documented at least twice in all cats before enrollment. Cats were referred for evaluation of ionized hypercalcemia (n = 5) or were incidentally found to have ionized hypercalcemia (n = 5). After medical workups, cats were diagnosed with either idiopathic hypercalcemia (IHC; n = 7) or chronic kidney disease (n = 3). Cats receiving medications to treat IHC (eg, alendronate, corticosteroids) were excluded. Nutritional recommendations were made to transition the cats to diets with less than 200 mg calcium per 100 kcal and a Ca:P ratio less than 1.4:1. Ionized calcium (iCa) concentrations were rechecked in all cats, with a median recheck time of 9 weeks (range 3–20). Of the 10 cats, nine (90%) had a decrease in iCa. Of the 10 cats, six (60%) became normocalcemic after the diet change, three (30%) had a partial response and one (10%) did not respond. Of the four cats that did not achieve normocalcemia with a change in diet, two (50%) received chia seeds (1–2 g per day), and at the next recheck, both cats’ iCa concentrations had normalized. Three cats had a long-term follow-up. Ionized normocalcemia was maintained for at least two consecutive follow-up visits over a median follow-up period of 33 weeks (range 12–34). Relevance and novel information Dietary calcium concentrations and the dietary Ca:P ratio appear to be important variables in considering nutritional approaches for hypercalcemic cats.
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Search related cases →Original publication on Crossref: https://doi.org/10.1177/1098612x241229811