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Although frequently consumed with meals, it remains unclear whether Ca can mitigate or aggravate the deleterious effects of a high-fat meal on cardiovascular risk factors. This study aimed to evaluate the effects of SC or DC on blood pressure (BP) and microvascular function (MVF) in the postprandial period in obese women challenged with a high-fat meal. In this cross-over controlled trial, sixteen obese women aged 20\u201350 years were randomly assigned to receive three test meals (2908 kJ (695 kcal); 48 % fat): high DC (HDCM; 547 mg DC), high SC (HSCM; 500 mg SC\u2013calcium carbonate) and low Ca (LCM; 42 mg DC). BP was continuously evaluated from 15 min before to 120 min after meals by digital photoplethysmography. Before and 120 min after meals, participants underwent evaluation of serum Ca and microvascular flow after postocclusive reactive hyperaemia (PORH) by laser speckle contrast imaging. Ionised serum Ca rose significantly only after HSCM. Systolic BP increased after the three meals, whereas diastolic BP increased after LCM and HDCM. Hyperaemia peak, hyperaemia amplitude and AUC evaluated after PORH decreased with LCM. After HDCM, there was a reduction in hyperaemia peak and hyperaemia amplitude, whereas HSCM decreased only hyperaemia peak. However, comparative analyses of the effects of three test meals on serum Ca, BP and MVF revealed no significant meal\u00d7time interaction. This study suggests that in obese women SC and DC do not interfere with the effects of a high-fat meal on BP and MVF.<\/jats:p>","DOI":"10.1017\/s0007114516003615","type":"journal-article","created":{"date-parts":[[2016,10,24]],"date-time":"2016-10-24T10:02:01Z","timestamp":1477303321000},"page":"1564-1572","update-policy":"http:\/\/dx.doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":3,"title":["No difference in acute effects of supplemental<i>v.<\/i>dietary calcium on blood pressure and microvascular function in obese women challenged with a high-fat meal: a cross-over randomised study"],"prefix":"10.1017","volume":"116","author":[{"given":"Tha\u00eds da Silva","family":"Ferreira","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Priscila Mansur","family":"Leal","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vanessa Parada","family":"Antunes","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Antonio Felipe","family":"Sanjuliani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M\u00e1rcia Regina Simas Torres","family":"Klein","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2016,10,24]]},"reference":[{"key":"S0007114516003615_ref52","doi-asserted-by":"publisher","DOI":"10.1017\/S0007114516001835"},{"key":"S0007114516003615_ref6","doi-asserted-by":"publisher","DOI":"10.3803\/EnM.2015.30.1.27"},{"key":"S0007114516003615_ref1","doi-asserted-by":"publisher","DOI":"10.2165\/11595400-000000000-00000"},{"key":"S0007114516003615_ref32","unstructured":"World Health Organization (2000) Obesity: Preventing and Managing the Global Epidemic. 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