High- Versus Low-calcium Water for Bone Health

Inclusion Criteria: * Body mass index ≥ 18 and \< 30 * Maintenance of diet and physical activity lifestyle throughout the duration of the study * Acceptance of informed consent Exclusion Criteria: * Consumption of water with calcium \> 150 mg/L * Pregnancy (as established by self-declaration), breastfeeding, menopause * Inability to follow the study protocol * Cardiac, vascular, renal, and oncological disease * Neuropsychiatric disease, developmental disorders * Disease or past surgery affecting the gastrointestinal tract * Drugs that interfere with bone (e.g. corticosteroids) or with fluid balance (e.g. diuretics)