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You can improve your B12 levels through supplements, injections, B12-rich foods (meat, dairy, fish), and doctor-prescribed nasal sprays or tablets

So, what do we have

However, there were notable differences in community composition between experiments including the absence of Akkermansia muciniphila , Bacteroides thetaiotaomicron , and Parasutterella species in the SURV experiments (Additional file 1 Fig

People who are at a high risk of B12 deficiency, such as those who eat strict vegetarian diets, should talk to their healthcare professional about screening for this condition

Data Availability Statement The data that support the findings of this study are available on request from the corresponding author.