Association of vitamin B12 with obesity, overweight, insulin resistance and metabolic syndrome, and body fat composition; primary care-based study

This 2013 cross-sectional study assessed 976 adults (414 obese, 212 overweight, 351 controls) in a primary care setting to examine the relationship between vitamin B12 levels and metabolic parameters. Findings revealed significantly lower vitamin B12 levels in obese (178.9 ± 25.2 pg/mL) and overweight (219.8 ± 78.5 pg/mL) individuals compared