Overview
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:
- Does the ingestion of Crocus sativus tepals cold aqueous extract prior to a meal improve the glycemic response to a standard meal?
- How does the ingestion of Crocus sativus tepals aqueous extract prior to a meal impact insulin levels and other markers of metabolic health?
- Does the ingestion of Crocus sativus tepals cold aqueous extract prior to a meal increase the resting energy expanditure?
Researchers will compare Crocus sativus tepals cold aqueous extract to cold water.
The participants will visit the Faculty twice - on one visit they will ingest Crocus sativus tepals cold aqueous extract and on the other cold water (in random order) 5 minutes prior to a standard meal of 100 g of white bread.
On each visit, anthropometric measurements will be performed upon arrival. Blood samples will be collected 3 times, preceeded by resting metabolic rate and blood pressure measurements: at baseline in fasted conditions, and 60 minutes and 120 minutes after consuming the bread.
There will be an at least 7 days wash-out period between the two visits.
Eligibility
Inclusion Criteria:
- Obesity type I (ITM \> 30 kg/m2) and/or
- Prediabetes (fasting glucose levels 6,1 - 6,9 mmol/L)
Exclusion Criteria:
- Gastrointestinal diseases
- Diabetes mellitus of any type
- Pregnant or lactating, without contraception
- Serious clinical conditions such as cancer, severe infections, severe psychiatric disorders, autoimmune diseases, inflammatory diseases
- Participation in another clinical trial 3 months prior to the study
- ITM greater than 35 kg/m2
- Celiac disease of gluten intolerance
- electronic implant