We describe a radioassay procedure for serum folate, in which commercially available crystalline 3lactoglobulirt is used as the folate-binding agent. The folate binders present in serum are eliminated by heating serum in a boiling water bath for 15 mm to denature the proteins. Radioassayable serum folate is shown to be stable under these conditions, and the results for folate compare well with ...

National data on the blood folate status of New Zealand adults is lacking. The objective of this study was to describe the blood folate status and examine the predictors of blood folate status in a national sample of adults from New Zealand, a country with voluntary folic acid fortification. The 2008/09 New Zealand Adult Nutrition Survey was a nationwide multistage systematic random cross-secti...

OBJECTIVE To understand the correlation of lower serum folate, and red blood cell (RBC) folate level with birth defects including unexplained recurrent pregnancy loss, and to evaluate the role of RBC folate level as a suitable marker for folate supplement. METHODS Two hundred and ninety-nine non-pregnant women at child-bearing age with a birth defect history were selected as birth defect grou...

Introduction: There is no comprehensive study on the effect of Folate on food intake therefore the present study was carried out to determine the effect of Folate supplementation on serum concentrations of Leptin and Grehlin and food intake in male Wistar rats. Methods: The study was carried out for 42 days during which the animals were weighed weekly their food and water intakes were measu...

background: alzheimer's disease is the most common form of dementia in the elderly. serum levels of homocysteine have been related to increased cortical and hippocampal atrophy. we aimed to determine the serum levels of homocysteine, folate, and vitamin b 12 in patients with alzheimer's disease.   methods: blood levels of homocysteine and its biological determinants, folate, and vitamin b12 wer...

Serum folate determination by this method requires incubation of 0.1 ml of serum (or standards) with nondialyzed milk and then with tritium-labeled folate. A serum blank corrects for nonspecific binders present in the serum. Unbound folate is removed with hemoglobin-coated charcoal. The standard deviation of the results is ±G.2 pig/liter, and more than 90% of folate added to the serum is accoun...

BACKGROUND Inflammatory bowel disease (IBD) patients may be at risk of vitamin B12 and folate insufficiencies, as these micronutrients are absorbed in the small intestine, which is affected by IBD. However, a consensus has not been reached on the association between IBD and serum folate and vitamin B12 concentrations. METHODS In this study, a comprehensive search of multiple databases was per...

High plasma total homocysteine (tHcy) concentration is reported to be a risk factor for vascular diseases. We investigated the extent to which serum folate and plasma tHcy respond to a high intake of natural folate from food. Thirty-seven healthy females volunteered t o participate in a crossover dietary intervention. The study included a baseline period and two 5-week diet periods (low- and hi...

We studied the effect of serum folate-binding protein (FBP) on folate radioassays and the relationship of the serum level of unsaturated FBP to the serum folate level in various clinical states. Our modification of a heat-extracted radioassay was compared to a whole serum radioassay. Our results confirmed the existence of elevated serum levels of unsaturated FBP in some normal subjects, in some...

STUDY OBJECTIVE To investigate the effect of the voluntary folate fortification policy in Australia on serum folate and total plasma homocysteine (tHcy) concentrations. DESIGN Population based cohort study. SETTING Perth, Western Australia. PARTICIPANTS Men and women aged 27 to 77 years (n = 468), who were originally randomly selected from the Perth electoral roll. The cohort was surveyed...