fda compounding peptides bpc 157 warning letter Heal or Harm: Body Protective Compound-157 in the Gray Zone FDA scientists flag concerns with
Description
PMC 6054240

Well, certain factors can hinder your body's ability to absorb B12 efficiently

preferred with heart failure or CKD per ADA 2026 Sulfonylureas (glipizide, glimepiride, glyburide): Stimulate insulin secretion

Less supported scenario: If your B12 status is already normal, extra B12 has not been shown to consistently boost energy in otherwise healthy people

In the future, yes
Severe absorption disorders: People with chronic inflammatory bowel diseases such as Crohn's disease or celiac disease often have difficulty absorbing vitamin B12 from food
