180
Participants
Start Date
October 31, 2004
Primary Completion Date
August 31, 2005
Study Completion Date
November 30, 2006
Vitamin B12
500 microgram daily supplement of vitamin B12 1000 mg injection vitamin B12 given at the start of the study
placebo
placebo given as a daily supplement 1000 mg injection of vitamin B12 given at the end of the study
Universidad Autonoma de Queretaro, Querétaro
USDA, Western Human Nutrition Research Center
FED