Effect of Betaine, Serine and Folic Acid on Vascular Function in Healthy Volunteers
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|ClinicalTrials.gov Identifier: NCT00126347|
Recruitment Status : Completed
First Posted : August 3, 2005
Last Update Posted : August 18, 2005
|Condition or disease||Intervention/treatment||Phase|
|Healthy Cardiovascular Diseases||Procedure: supplementation with betaine, serine, and folic acid||Not Applicable|
A high plasma homocysteine is a potential risk factor for cardiovascular disease and death. However, it remains uncertain whether homocysteine per se, low status of folate, or other factors related to methionine metabolism are involved in the pathogenesis of cardiovascular disease. Previous studies have shown that a high concentration of homocysteine in blood is related to an impaired vascular function in the arteries, an indicator of cardiovascular disease risk. Virtually all intervention trials used folic acid as a homocysteine-lowering agent, which may however affect vascular function through mechanisms not related to homocysteine. The researchers investigated whether reduction in homocysteine concentrations following a methionine load, via supplementation with serine, betaine or folic acid improves vascular function in healthy volunteers, in order to distinguish between effects of folic acid and of homocysteine-lowering per se.
Comparison: The effects of supplementation with serine, folic acid and betaine (all together with an oral methionine load) were compared to the effects of a placebo (together with a methionine load) on plasma homocysteine concentrations and on vascular function following methionine loading in healthy volunteers.
|Study Type :||Interventional (Clinical Trial)|
|Enrollment :||40 participants|
|Intervention Model:||Crossover Assignment|
|Official Title:||Effect of Lowering of Plasma Homocysteine Concentrations After an Oral Methionine Load on Vascular Function in Healthy Volunteers|
|Study Start Date :||August 2002|
|Study Completion Date :||July 2003|
- concentrations of plasma homocysteine before and following an oral methionine load
- vascular function, measured as flow mediated vasodilation before and following an oral methionine load
- blood pressure
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00126347
|Wageningen Centre for Food Sciences|
|Study Chair:||Petra Verhoef, PhD||Wageningen Centre for Food Sciences|