A Phase 3 interventional study of TEST 1 and TEST 2 in Hyperhomocysteinemia, sponsored by Center for Health, Exercise and Sport Sciences, Serbia. Completed at 1 site in Serbia. Open to participants aged 18 Years to 30 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2011-12-20.
Sponsored by Center for Health, Exercise and Sport Sciences, Serbia · Phase 3, Interventional, and Treatment
A methyl-group acceptor such as guanidinoacetic acid (GAA) could induce hyperhomocysteinemia with the effects of GAA expected to be dose-dependent. Due to the fact that hyperhomocysteinemia is thought to be an independent risk factor for cardiovascular and neurodegenerative diseases, different dietary agents were used in the past for the treatment of elevated total plasma homocysteine (T-HCy), e. g. betaine, choline (betaine precursor) or folic acid. In the context of GAA loading the question arises whether intake of betaine, choline (betaine precursor) or folic acid during GAA loading could affect plasma T-HCy in healthy humans. Forty healthy physically active men and women aged 20 to 30 years will take part in this GAA-controlled, double-blind and parallel-group intervention study. Subjects will be allocated to four randomly assigned trials, with treatment lasting for 8 weeks and washout period of 28 days. The 4 test treatment-groups will include TEST1 (GAA only), TEST2 (GAA, choline, B6, B12 and folic acid), TEST3 (GAA, betaine, B6, B12 and folic acid) and TEST4 (GAA, B6, B12 and folic acid). Plasma T-HCy will be the primary outcome measure assessed every second week throughout the study. Plasma B-vitamins and blood and urine metabolites (GAA, creatine, methionine, arginine) will be secondary outcome measures along with adverse-effects indicators assessed every second week throughout the study. Selected body composition indicators will be obtained at 0, 2, 8 and 12 weeks throughout the study to monitor the effects of experimental treatments on body hydration and protein synthesis. This research will test the hypothesis that a combination of GAA with homocysteine lowering nutrients attenuates the elevation of T-hcy, and will further display the size-effect of each additive used.
34 studies on the registry are indexed under Hyperhomocysteinemia; 4 are open to participants now.
This study's enrollment of 40 is below the median of 84 across 21 interventional studies indexed under Hyperhomocysteinemia.
Browse Hyperhomocysteinemia studies →Center for Health, Exercise and Sport Sciences, Serbia is the lead sponsor of 7 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
2.4 g/day of guanidinoacetic acid
Drug: TEST 1
2.4 g/day of guanidinoacetic acid + 3.0 g/day of choline dihydrogen citrate + 5 µg/day of B12 + 10 mg/day of B6 + 600 µg/day of folic acid
Drug: TEST 2
2.4 g/day of guanidinoacetic acid + 1.6 g/day of betaine HCl + 5 µg/day of B12 + 10 mg/day of B6 + 600 µg/day of folic acid
Drug: TEST 3
2.4 g/day of guanidinoacetic acid + 5 µg/day of B12 + 10 mg/day of B6 + 600 µg/day of folic acid
Drug: TEST 4
2.4 g/day of guanidinoacetic acid
2.4 g/day of guanidinoacetic acid + 3.0 g/day of choline dihydrogencitrate + 5 µg/day of B12 + 10 mg/day of B6 + 600 µg/day of folic acid
2.4 g/day of guanidinoacetic acid + 1.6 g/day of betaine HCl + 5 µg/day of B12 + 10 mg/day of B6 + 600 µg/day of folic acid
2.4 g/day of guanidinoacetic acid + 5 µg/day of B12 + 10 mg/day of B6 + 600 µg/day of folic acid
Total plasma homocysteine
Time frame: 3 months
Serum creatine
Time frame: 3 months
This study is completed, as verified in Dec 2011. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Center for Health, Exercise and Sport Sciences, Serbia