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Vitamin B12 is water-soluble, which means your body typically excretes any excess in your urine

Studies suggest that an injection of Butaphosphan and Vitamin B12 on the day of calving and one day later can decrease the prevalence of subclinical ketosis during the week after calving in mature dairy cows

There are little to no risks associated when used as a supplement by people with low to normal red blood cell levels

It is likely that the larger number of statistically significant changes to the microbiome observed in the groups switched from WD to LD reflects their more numerous exposures to different diets, longitudinal changes in dietary exposure, the stress associated with diet switch, the negative energy state achieved by treatment and/or diet-driven weight loss, or a combination of these factors, but it may also be related to differences in terminal body weight and fat mass since both adiposity and diet composition have been shown to modulate the mouse gut microbiome profile

However, if you would prefer to take a pill at home or are on a budget, then B12 pills may be a better choice