Allicin Bioavailability From Garlic Supplements and Garlic Foods
Schlüsselwörter
Abstrakt
Beschreibung
The bioavailability of allicin, the main active compound of garlic, from garlic supplements and garlic foods is highly questionable and unpredictable from in vitro tests, due to dependence upon alliinase activity under conditions that challenge alliinase activity (heat, gastric acid, intestinal proteases). It is likely that garlic supplement manufacturing procedures and coatings, meal conditions when supplements are consumed (high or low protein), and garlic food preparation conditions (temperature, surface area) will greatly affect allicin bioavailability. Such variability may account for some of the many conflicts seen in clinical trials on cardiovascular disease risk factors.
To resolve these issues, this study will determine the actual bioavailability of allicin from several types of garlic supplements and garlic foods under various conditions. Bioavailability will be determined by measuring the area under the 32-hour curve for breath concentrations of allyl methyl sulfide, the main metabolite allicin.
Termine
| Zuletzt überprüft: | 10/31/2009 |
| Zuerst eingereicht: | 03/31/2009 |
| Geschätzte Einschreibung eingereicht: | 03/31/2009 |
| Zuerst veröffentlicht: | 04/01/2009 |
| Letztes eingereichtes Update: | 11/17/2009 |
| Letztes Update veröffentlicht: | 11/19/2009 |
| Tatsächliches Startdatum der Studie: | 03/31/2009 |
| Geschätztes primäres Abschlussdatum: | 03/31/2011 |
| Voraussichtliches Abschlussdatum der Studie: | 03/31/2011 |
Zustand oder Krankheit
Intervention / Behandlung
Other: 1
Dietary Supplement: 2
Phase
Armgruppen
| Arm | Intervention / Behandlung |
|---|---|
| Active Comparator: 1 Positive control with 100% allicin bioavailability | Other: 1 1 gram crushed garlic in gelatin capsules, one dose once every 2-16 weeks |
| Experimental: 2 garlic powder tablet | Dietary Supplement: 2 tablets, dose to contain 1 gram of garlic powder, consume one dose once every two weeks for up to 52 weeks |
Zulassungskriterien
| Altersberechtigt für das Studium | 18 Years Zu 18 Years |
| Studienberechtigte Geschlechter | All |
| Akzeptiert gesunde Freiwillige | Ja |
| Kriterien | Inclusion Criteria: - in good health (self-judged) - BMI (body mass index): 19-32 kg/m2 - not planning to move out of the area in the next year - willing to abstain from consuming garlic and onion and foods that contain them for two days prior to and during each test (diet restrictions) - able to deliver bags of breath to the research facility five times in two days - willing to eat whole wheat tuna sandwiches Exclusion Criteria: - known serious health problems: diabetes, heart disease, active neoplasms, renal or liver disease, hyper- or hypothyroidism, breathing disorders, gastroesophageal reflux disease (GERD), gastrointestinal disease (absorption interference) - known allergy to garlic or wheat - tobacco user - excessive alcohol intake (³2 drinks/day, self-reported) - unable to speak English well |
Ergebnis
Primäre Ergebnismaße
1. Breath allyl methyl sulfide [1-32 hours]
