• Muhammed Masum Canat, Adnan Batman, Çiğdem Dönmez, Hatice Köstek, Mehmet Köstek, Zeynep Mine Yalçınkaya Kara, Feyza Yener Öztürk, and Yüksel Altuntaş.
• University of Health Sciences, Şişli Hamidiye Etfal Training and Research Hospital, Department of Endocrinology and Metabolism - Istanbul, Turkey.
• Rev Assoc Med Bras (1992). 2023 Jan 1; 69 (11): e20230406e20230406.

ObjectiveA significant problem that compels clinicians in the conventional treatment of hypoparathyroidism is patients' non-adherence to treatment. This study aimed to evaluate the effects of adequate Ca intake with dietary recommendations among hypoparathyroidism patients who persistently use Ca supplementation irregularly on plasma Ca and phosphate levels.MethodsThis prospective, randomized, controlled study was conducted on patients diagnosed with chronic hypoparathyroidism who persistently interrupt Ca supplementation therapy and therefore have a hypocalcemic course. Patients with a total daily Ca intake below 800 mg were randomized. All patients were advised to keep the doses of active vitamin D and Ca supplements they were currently using. The patients in the study group (n=32) were advised to consume 1,000-1,200 mg of Ca daily, and the patients in the control group (n=35) were advised to continue their diet according to their daily habits. After 12 weeks of follow-up, the patients' laboratory values were compared between groups to assess treatment goals.ResultsThe mean of the total Ca level was 8.56±0.36 mg/dL in the study group and was found to be significantly higher than that in the control group, which was 7.67±0.48 mg/dL (p<0.001). The mean serum phosphate and serum Ca-P product levels were significantly higher in the study group (p<0.001) but did not exceed the safe upper limits in any patient.ConclusionA suitable increase in dietary Ca intake could effectively control hypocalcemia in patients with hypoparathyroidism who persistently interrupt the recommended calcium supplementation.

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