Peptides and proteins are both made up of amino acids, but the key difference lies in their size and structure. Peptides are short chains of typically 2 to 50 amino acids, while proteins are longer, more complex chains of 50 or more amino acids that fold into specific three-dimensional structures. In laboratory research, synthetic peptides such as BPC-157, GHK-Cu, TB-500, and MOTS-c are valued precisely because of their smaller size — making them highly specific, easier to synthesise to high purity, and more targeted in cellular and metabolic research models. 

A lyophilised peptide is a research compound that has been freeze-dried — a process that removes water content from the peptide solution while preserving its molecular structure, purity, and potency. Lyophilisation (freeze-drying) is the gold standard preservation method for high-purity research peptides, producing a stable, dry powder that is significantly easier to store, transport, and handle in laboratory settings than liquid solutions:

Proper storage of research peptides is essential to maintaining their purity, stability, and integrity for laboratory use. Research peptides are sensitive compounds that can degrade if exposed to heat, light, moisture, or repeated freeze-thaw cycles. Following correct storage protocols ensures your research-grade peptides remain viable and reliable throughout your study. Reconstituted Peptide Storage:

After reconstitution with bacteriostatic water, store at 2-8°C (refrigerated)
Use reconstituted peptide solution within 28 days for optimal stability
Avoid repeated freeze-thaw cycles — these degrade peptide integrity significantly

Compound-Specific Storage Notes:

BPC-157 — store lyophilised at -20°C; refrigerate after reconstitution
TB-500 — store lyophilised at -20°C; sensitive to light exposure
GHK-Cu (Copper Peptide) — store lyophilised at -20°C; stable at room temperature short-term
NAD+ — store lyophilised at -20°C; avoid humidity
AOD-9604 — store lyophilised at -20°C; refrigerate after reconstitution
MOTS-c — store lyophilised at -20°C; keep away from direct light
5-Amino-1MQ — store at -20°C; stable in solution short-term at 2-8°C

A Certificate of Analysis (COA) is an official quality assurance document issued by an independent third-party laboratory, confirming the identity, purity, and composition of a research peptide. For research-grade peptides, a COA is the single most important document a supplier can provide — it gives researchers independent, verifiable proof that the compound they have purchased is exactly what it claims to be, at the stated purity level, free from contaminants and correctly identified What to watch for when reviewing a COA:

Yes research peptides are legal to purchase and possess in the UK, provided they are supplied and used strictly for laboratory and research purposes only. Research peptides such as BPC-157, TB-500, GHK-Cu, NAD+, AOD-9604, 5-Amino-1MQ, and MOTS-c are not controlled substances under the Misuse of Drugs Act 1971, are not listed under the Psychoactive Substances Act 2016, and are not licensed medicines under the Human Medicines Regulations 2012 provided they carry no medicinal claims and are not marketed for human consumption.

GHK-Cu (Glycyl-L-histidyl-L-lysine copper complex) is a naturally occurring copper-binding tripeptide found in human plasma, saliva, and urine. It is one of the most widely referenced research peptides in published laboratory literature, studied extensively in cellular signalling, dermal biology, collagen synthesis pathways, and wound-healing research models.

Importance:

GHK-Cu is the second most searched individual peptide compound in the UK market, with particularly strong search volume in dermal biology and skincare research niches.

NAD+ (Nicotinamide Adenine Dinucleotide) is a naturally occurring coenzyme found in every living cell, playing a central role in cellular energy metabolism and mitochondrial function. In laboratory research, high-purity NAD+ is widely used as a reference compound in studies exploring cellular ageing models, metabolic pathway regulation, and mitochondrial biology. Supplied as a research-grade lyophilised compound, NAD+ is one of the most frequently sourced metabolic research compounds among UK laboratories and research institution

Research peptides supplied by reputable UK suppliers are manufactured to high-purity laboratory standards, third-party tested, and backed by a Certificate of Analysis (COA) confirming compound identity and purity. When sourced from a trusted, compliant UK supplier such as GLP1 Health, research peptides like BPC-157, TB-500, GHK-Cu, NAD+, AOD-9604, and MOTS-c are supplied as verified, lab-grade compounds with established preclinical safety profiles in published laboratory literature.
However it is important to note:

• Research peptides sourced from reputable, COA-verified UK suppliers meet strict laboratory quality standards
• All compounds supplied by GLP1 Health are third-party tested and purity-verified before dispatch

At GLP1Health UK  we are committed to supplying high-quality research peptides for laboratory and scientific research applications. Our catalogue includes advanced GLP-1 and GIP research compounds such as Tirzepatide, Retatrutide, Semaglutide, BPC-157, TB-500, GHK-Cu, NAD+, and other research peptides designed to support metabolic, cellular, and peptide science investigations.