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Before ordering BPC-157, TB-500, or any research peptide, check for: A Certificate of Analysis (COA) for the specific batch/lot, not just a generic product-line COA Third-party HPLC (high-performance liquid chromatography) purity testing, ideally listing a percentage above 98% Mass spectrometry verification confirming the correct molecular structure Clear Research Use Only Not for Human Consumption labeling USA-based sourcing and domestic shipping, which shortens degradation risk during transit Suppliers who publish batch-specific COAs and welcome purity questions signal a more research-serious operation than suppliers who treat testing documentation as optional
Vitamin B12 deficiency affects 5% of the general population and 10%20% of older people, aged 65 years + (Lacombe V, 2024)
Pre-cancerous conditions warrant caution as well
Vitamin B12: fact sheet for health professionals
