completed patient rectuitment

The purpose of this study is to determine the commonness of the C677T mutation in the MTHFR gene in subjects with B12 deficiency. Also, we'd like to investigate the effect of B12 deficiency combined with the C677T mutation on endothelial function.

we showed that patiebts with B12 deficiency have higher than expected frequency of MTHFR mutation and patients with both abnormalities havean abnormal endothelial function

Inclusion Criteria:

1. adult males and females of the broad population aged 20-60
2. with no symptomatic heart disease/condition
3. with Vitamin B12 levels of 150 pmol or less
4. which have not received Vitamin B12 supplement treatment before

Exclusion Criteria:

1. Adults suffering from a known heart disease/condition
2. any disease the investigator might find as interfering with the process of the experiment
3. tumor-oriented diseases