Sponsor study identifier
interventional
20
1 country
1
Study Start
February 6, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Primary Completion
June 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
December 2026
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
The goal of this clinical trial is to determine the acute effects of ingestion of a cold aqueous extract of Crocus sativus tepals on postprandial glycemia and other indicators of metabolic health in patients with obesity and/or prediabetes. The main questions it aims to answer are:
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
December 2026
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
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Some registry-reported names shown below are not yet linked in this graph.
Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
November 22, 2025
Actual (reported)December 3, 2025
Actual (reported)February 6, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
June 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
December 2026
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
glucose levels
Serum glucose levels will be measured from venous blood at baseline and 60 and 120 minutes after bread ingestion.
From enrollment to the end of second measurement at 2 weeks
insulin level
From enrollment to the end of second measurement at 2 weeks.
Resting metabolism
From enrollment to the end of the second measurement, at 2 weeks
Blood pressure
baseline, 60 minutes after bread ingestion, 120 minutes after bread ingestion
Crocus sativus tepals cold aqueous extract
cold water
2 g of Crocus sativus tepals will be infused in 200 mL of water overnight at 4 °C, resulting cold aqueous extract corresponds to 40 mg GAE of polyphenols
200 mL of cold water, kept overnight at 4 °C
University pf Primorska, Faculty of Health Sciences
Izola, 6310, Slovenia
Barik SK, Sengupta S, Arya R, Kumar S, Kim JJ, Chaurasia R. Dietary Polyphenols as Potential Therapeutic Agents in Type 2 Diabetes Management: Advances and Opportunities. Adv Nutr. 2025 Jan;16(1):100346. doi: 10.1016/j.advnut.2024.100346. Epub 2024 Nov 19.
Omidi A, Riahinia N, Montazer Torbati MB, Behdani MA. Hepatoprotective effect of Crocus sativus (saffron) petals extract against acetaminophen toxicity in male Wistar rats. Avicenna J Phytomed. 2014 Sep;4(5):330-6.
Nina Mohorko, PhD
University pf Primorska, Faculty of Health Sciences
First Submitted
November 22, 2025
First Posted
December 3, 2025
Study Start
February 6, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Primary Completion
June 2026
Registry-reported names are shown in full. Names without a link have not yet been matched to a Syfrah profile.
Contact the study team to confirm eligibility.
Moratalla-Lopez N, Bagur MJ, Lorenzo C, Salinas MEMR, Alonso GL. Bioactivity and Bioavailability of the Major Metabolites of Crocus sativus L. Flower. Molecules. 2019 Aug 2;24(15):2827. doi: 10.3390/molecules24152827.
Montoro P, Maldini M, Luciani L, Tuberoso CI, Congiu F, Pizza C. Radical scavenging activity and LC-MS metabolic profiling of petals, stamens, and flowers of Crocus sativus L. J Food Sci. 2012 Aug;77(8):C893-900. doi: 10.1111/j.1750-3841.2012.02803.x. Epub 2012 Jul 18.
Menghini L, Leporini L, Vecchiotti G, Locatelli M, Carradori S, Ferrante C, Zengin G, Recinella L, Chiavaroli A, Leone S, Brunetti L, Orlando G. Crocus sativus L. stigmas and byproducts: Qualitative fingerprint, antioxidant potentials and enzyme inhibitory activities. Food Res Int. 2018 Jul;109:91-98. doi: 10.1016/j.foodres.2018.04.028. Epub 2018 Apr 16.
Bursac B, Bellachioma L, Gligorovska L, Jovanovic M, Teofilovic A, Vrataric M, Vojnovic Milutinovic D, Albacete A, Martinez-Melgarejo PA, Morresi C, Damiani E, Bacchetti T, Djordjevic A. Crocus sativus tepals extract suppresses subcutaneous adipose tissue hypertrophy and improves systemic insulin sensitivity in mice on high-fat diet. Biofactors. 2024 Jul-Aug;50(4):828-844. doi: 10.1002/biof.2043. Epub 2024 Feb 6.
Bellachioma L, Morresi C, Albacete A, Martinez-Melgarejo PA, Ferretti G, Giorgini G, Galeazzi R, Damiani E, Bacchetti T. Insights on the Hypoglycemic Potential of Crocus sativus Tepal Polyphenols: An In Vitro and In Silico Study. Int J Mol Sci. 2023 May 24;24(11):9213. doi: 10.3390/ijms24119213.
This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
December 2026
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
Last Updated
February 4, 2026
Record last verified: 2026-02
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Source: ClinicalTrials.gov.
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