(PubMed) Naeini AM, Elmadfa I, Djazayery A, et al
So, we recommend using SL vitamin B12 rather than oral and IM, especially in patients who do not tolerate IM injection and patients who need prolonged vitamin B12 supplementation, such as patients with long-term metformin use and patients with pernicious anemia or with gastro-duodenal resection [51,52,53,54]
Background reading: what a peptide Certificate of Analysis actually shows
It was the most effective antidiabetic agent anyone had ever seen, says Andrew Young, former vice president of research at Amylin Pharmaceuticals, the San Diegobased company that brought Byetta to market
They can also counsel you on realistic outcomes and possible side effects