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Low-purity peptides contain impurities truncated sequences, oxidized residues, salt contaminants, or endotoxins that can confound research results by producing off-target biological effects
Mild, short-lived reactions can include soreness at the injection site, a brief flushing sensation, or, very rarely, mild nausea
This is particularly important for individuals with gastrointestinal disorders, reduced intrinsic factor, or other malabsorption concerns
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In UK primary care, patients with a B12 above 1,000 pmol/L had a one-year cancer incidence rate ratio of 4.72 compared with those in the reference range
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