Conditions like Crohn's and celiac disease, along with past surgeries involving the stomach or small intestine, can each get in the way of how well you take up B12
Some grains, like breakfast cereals and nutritional yeast, are also fortified with the nutrient ( On the contrary, liquid vitamin B12 supplements are made synthetically in laboratories using microbes and other chemical processes
The preservative system works against a broad spectrum of common contaminants encountered in laboratory environments, including Staphylococcus, Streptococcus, Pseudomonas, and Escherichia species
DOSE-RESPONSE CURVES IN THE ESTIMATION OF POTENCY OF LIPOTROPIC AGENTS*
And then wonders why results don't replicate
However, recognising when symptoms warrant further assessment ensures safe, effective treatment