Vitamin b12 deficiency has been linked to cognitive problems and memory loss in adults
Pregnant or breastfeeding women, people with copper metabolism disorders like Wilsons disease, and anyone with active skin infections should speak with a doctor before starting
The reason it is less common is that it is included in most commercial pig feeds, as with poultry
When to Seek Help: What If I Don't Feel Better
For others, it may take several days or even a few weeks to experience the full effects, as your body gradually rebuilds its B12 stores and enhances red blood cell production
Clinical Trials: Impact of B12 Supplementation on Metabolites Below are four graphs showing the response to B12 supplementation of serum B12, holotranscobalamin, MMA, and homocysteine: Eight trials of predominantly older adults with at least mild deficiency (Dangour, 2015