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Elevated methylmalonic acid and total homocysteine levels show high prevalence of vitamin B12 deficiency after gastric surgery

Because this kind of study can show an association but cannot prove cause and effect, the takeaway is not that B12 is dangerous

If the needle is going just under the skin (subcutaneous), hold it at a 45-degree angle

In the Irish research space Retatrutide tends to appear in the pathways described above
