Peptide research basics
An introduction to peptide terminology, research classifications, sequences, and scientific documentation.
Read MoreKNOWLEDGE CENTER
Research information, explained clearly
Explore research-focused educational resources covering peptide terminology, laboratory testing, product documentation, Certificates of Analysis, and lot-level traceability.
Research Use Only. Educational content is provided for laboratory and scientific research purposes and does not constitute medical, diagnostic, therapeutic, prescribing, administration, or dosing guidance.
Read Research DisclaimerExplore research topics
Understanding Certificates of Analysis
Learn what a COA contains, how to read laboratory results, and why each certificate applies only to a specific tested sample and lot.
Read MoreIdentity testing
Understand how analytical methods may be used to assess whether a tested sample matches its expected identity.
Read MorePurity testing
Learn how analytical purity results are reported and why a purity percentage does not represent approval for human use.
Read MoreLot and batch traceability
Understand the importance of connecting every document to the correct product, strength, lot, and batch.
Read MoreLaboratory terminology
Definitions of common analytical, documentation, and research terms used across product and COA records.
Read MoreProduct documentation
Learn how product names, strengths, accessions, laboratory records, and original PDFs should be reviewed together.
Read MoreResearch storage documentation
General documentation principles for recording storage conditions and maintaining research sample traceability.
Read MoreFeatured research guides
COA and Testing
How to read a Certificate of Analysis
A neutral walkthrough of the sections and identifiers that appear on a laboratory COA.
6 min readLast reviewed: 2026-07-15
Read GuideCOA and Testing
Identity confirmed vs requires review
4 min read · 2026-07-15
COA and Testing
What does purity percentage mean?
5 min read · 2026-07-15
Documentation
Why lot numbers matter
4 min read · 2026-07-15
Documentation
How original PDF integrity is verified
How checksums help confirm that a laboratory document has not been altered.
Documentation
Understanding accession and search codes
How accession numbers and search codes link a product to its laboratory record.
COA and Testing
Why one COA cannot cover every lot
Why each analytical result is bound to a single tested sample from one lot.
Terminology
Research Use Only: what it means
What the Research Use Only designation communicates about product scope.
Understanding COA verification
A Certificate of Analysis applies only to the tested sample and the specific lot identified in the original laboratory document.
Explore COA Library- 01Product
- 02Strength
- 03Lot or batch
- 04Accession number
- 05Laboratory
- 06Identity result
- 07Purity result
- 08Original PDF
- 09Publication status
Identity and purity are not the same
Identity
Identity testing assesses whether the tested sample matches the expected compound or material.
Identity confirmedPurity
Purity testing reports the proportion of the measured target material under the specified analytical method and conditions.
A high reported purity result does not replace identity confirmation and does not indicate approval for human use.
Research glossary
- Accession Number
- A unique identifier a laboratory assigns to a tested sample and its associated record.
- Analytical Method
- The specific instrument, procedure, and conditions used to test a sample.
- Batch
- A group of material produced together and tracked under a shared batch code.
- Certificate of Analysis
- A laboratory document reporting analytical results for a specific tested sample and lot.
- Checksum
- A cryptographic fingerprint used to confirm that a document has not been altered.
- Chromatography
- A family of analytical techniques that separate components of a mixture for measurement.
- Identity
- Whether a tested sample matches the expected compound or material.
- LC-MS
- Liquid chromatography combined with mass spectrometry — a common identity and purity technique.
- Lot
- A specific quantity of material produced under a single set of conditions and tracked as one unit.
- Lyophilized
- Freeze-dried under vacuum to remove water while preserving structure.
- Net Content
- The declared quantity of target material in a container, excluding packaging.
- Purity
- The proportion of the measured target material in a tested sample under a stated method.
- Research Use Only
- A designation indicating a product is intended for laboratory research only.
- Sample
- The specific aliquot of material submitted for analytical testing.
- Search Code
- An identifier used to look up a specific laboratory record.
- Traceability
- The ability to link a document, sample, or result back to its source lot and record.
Product research library
Longevity
NAD+ · 500 mg
Nicotinamide adenine dinucleotide research compound for cellular metabolism studies.
COA pending
Price on Request
Metabolic
MOTS-c · 10 mg
Mitochondrial-derived peptide reference material for metabolic research.
COA pending
Price on Request
Metabolic
MOTS-c · 20 mg
Higher-strength MOTS-c reference material for extended in-vitro studies.
COA pending
Price on Request
Longevity
Epithalon · 10 mg
Tetrapeptide research compound investigated in telomere and pineal studies.
COA pending
Price on Request
Signal
Tesamorelin · 5 mg
Growth hormone-releasing hormone analog reference peptide.
COA pending
Price on Request
Signal
Tesamorelin · 10 mg
Higher-strength tesamorelin reference material for laboratory research.
COA pending
Price on Request
Signal
Sermorelin · 5 mg
GHRH analog reference peptide studied for signaling pathway research.
COA pending
Price on Request
Regenerative
BPC-157 · 5 mg
Body Protection Compound reference peptide extensively studied in vitro.
COA pending
Price on Request
Regenerative
BPC-157 · 10 mg
Higher-strength BPC-157 reference peptide for extended tissue studies.
COA pending
Price on Request
Regenerative
TB-500 · 10 mg
Thymosin Beta-4 fragment reference peptide for regenerative research.
COA pending
Price on Request
Longevity
Glutathione · 1500 mg
Reduced glutathione tripeptide antioxidant reference material.
COA pending
Price on Request
Signal
PT-141 · 10 mg
Melanocortin receptor agonist reference peptide for signaling research.
COA pending
Price on Request
Regenerative
GHK-Cu · 50 mg
Copper tripeptide reference material for extracellular matrix studies.
COA pending
Price on Request
Metabolic
Retatrutide · 10 mg
Triple agonist reference peptide for metabolic pathway research.
COA pending
Price on Request
Signal
Kisspeptin · 10 mg
Kiss1 receptor agonist reference peptide for endocrine signaling research.
COA pending
Price on Request
Latest from the Knowledge Center
COA and Testing
How to read a Certificate of Analysis
A neutral walkthrough of the sections and identifiers that appear on a laboratory COA.
6 min read · 2026-07-15
COA and Testing
Identity confirmed vs requires review
What each identity status means and how laboratories express review requirements on a COA.
4 min read · 2026-07-15
COA and Testing
What does purity percentage mean?
How purity is reported and why the reported value depends on the analytical method used.
5 min read · 2026-07-15
Documentation
Why lot numbers matter
Why every COA is bound to a specific lot and how lot codes support traceability.
4 min read · 2026-07-15
Scientific references are provided for educational context. Inclusion does not constitute endorsement of human use.
Educational information, not medical guidance
The Knowledge Center provides general research-focused educational information. It does not provide medical advice, diagnosis, treatment recommendations, prescribing information, dosage guidance, administration instructions, or instructions for human use.
Explore with transparency
Review research terminology, laboratory documentation, and lot-specific COA records through the Groppi American Peptides knowledge system.