Dr Peptides

Best Sellers

Shop by Goals

Beauty & Anti Aging

Why Choose Us?

Dr Peptides gives you the quality, technology, and expertise needed to advance your research. Every product is backed by strict quality controls and real scientific knowledge — ensuring your research moves forward with accuracy, reliability, and confidence.

Our Service

Dr Peptides provides full-service support for your peptide research, backed by a commitment to customer care. We’re here to guide you with personalized assistance every step of the way.

What are peptides?

Peptides are chains of amino acids — the fundamental building blocks of proteins. When two amino acids link together, they form what’s known as a peptide bond. This bond is created when the carboxyl group of one amino acid reacts with the amino group of another, releasing a molecule of water in the process.

Dr Peptides is a trusted Canadian wholesaler and direct-to-consumer supplier specializing in premium, high-purity peptides and research proteins. We partner with leading manufacturers and scientific facilities to source products that consistently exceed 99% purity, ensuring exceptional reliability and performance.

Every peptide we offer undergoes strict quality verification. Our team conducts in-house analytical testing at key stages — supported by High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) — to confirm purity, identity, and accuracy before products reach our customers. With rigorous quality controls from sourcing to packaging and delivery, Dr Peptides provides research-grade peptides you can trust.

Learn more about our company

Frequently asked questions

Peptides are short chains of amino acids — the essential building blocks of proteins. When two amino acids join together, they form a peptide bond. This bond occurs when the carboxyl group of one amino acid reacts with the amino group of another, releasing a water molecule (a process known as dehydration synthesis).

By repeating this bonding process, additional amino acids can join the chain, forming longer sequences called polypeptides. When a polypeptide becomes sufficiently long and structurally complex, it can form a complete protein.

Peptides occur naturally in living organisms through translation, where ribosomes assemble amino acids into chains based on genetic instructions.

In laboratory settings, peptides can also be synthesized through advanced chemical techniques, allowing researchers to create precise amino acid sequences for targeted scientific applications.

Peptides form when amino acids connect through peptide bonds created by dehydration synthesis. This chain-building process continues until a polypeptide is formed. Depending on the length and complexity of the chain, the structure may become a functional protein.

In nature, the ribosome drives this process using genetic code.

In research settings, scientists intentionally create peptides using controlled synthesis methods, enabling custom sequences optimized for study, analysis, and experimentation.

Peptides vary widely in structure and function. Some common categories include:

Signal Peptides

Guide proteins to specific locations inside or outside the cell.

Hormonal Peptides

Act as chemical messengers in the body (e.g., insulin, glucagon, growth hormone, oxytocin).

Neuropeptides

Support neurotransmission and regulate nervous system responses (e.g., substance P, enkephalins, endorphins).

Antimicrobial Peptides

Provide defense against pathogens (e.g., defensins, cathelicidins).

Enzyme-Active Peptides

Possess enzymatic activity, such as ACE-inhibiting peptides used to regulate blood pressure.

Cell-Penetrating Peptides

Can cross cell membranes to deliver molecules like drugs or genetic material.

Vaccine Peptides

Trigger immune responses for experimental vaccine development.

Targeted Therapy Peptides

Bind specific receptors or molecules for targeted treatments (often studied in cancer research).

Structural Peptides

Support tissue integrity and structure (e.g., collagen peptides).

These categories highlight the incredible diversity and scientific importance of peptides in biological systems and therapeutic research.

Lyophilized Peptides

Most research peptides are supplied in lyophilized (freeze-dried) form.

Lyophilization removes water through freezing and sublimation, creating a stable, dry powder. This process protects peptides from degradation, microbial growth, and structural breakdown — making them easier to ship, store, and handle.

Lyophilized peptides remain potent for long periods and can be reconstituted at any time using a suitable solvent.

How to Reconstitute Peptides (For Research Use Only)

Follow proper laboratory technique to ensure accuracy and quality in your research.

1. Gather Materials

Lyophilized peptide

Suitable solvent (Dr Peptides recommends pharmaceutical-grade bacteriostatic water)

Sterile syringe

Additional sterile vial (if needed)

2. Determine Concentration & Volume

Calculate the desired peptide concentration for your experiment and the solvent volume required.

3. Add Solvent

Draw the correct amount of solvent (usually 1–3 mL depending on the peptide) and gently inject it into the vial, allowing it to run down the glass wall to prevent foaming or structural disruption.

4. Dissolve Gently

Swirl the vial lightly until dissolved. Avoid shaking, which can denature sensitive peptides.

5. Allow Complete Dissolution

Let the peptide fully dissolve. Ensure no particles remain before use.

6. Store Correctly

Follow proper storage conditions immediately after reconstitution to maintain stability and purity.

7. Record Everything

Document concentration, solvent volume, date, and any experimental details — essential for reproducibility.

Always consult qualified laboratory professionals to ensure proper handling procedures for your specific peptide of interest.

Proper storage is essential to preserve peptide purity, stability, and research accuracy.

Short-Term Storage

Store unopened lyophilized peptides in a cool, dark environment.
For immediate or near-future use (days to months), keep refrigerated at 4°C (39°F).
At this temperature, most lyophilized peptides remain stable 1–2 years (unmixed).

Room Temperature Stability

Lyophilized peptides can remain stable at room temperature for several weeks if kept away from direct sunlight and heat.

Long-Term Storage

For storage beyond several months, freeze peptides at –20°C or lower.
Freezing greatly extends shelf life and protects structural integrity.

Avoid Freeze–Thaw Cycles

Repeated thawing can degrade peptides.

Use aliquots whenever possible to prevent unnecessary freeze–thaw exposure.

Avoid Frost-Free Freezers

Frost-free freezers experience temperature fluctuations that can compromise peptide stability.

Use a standard, non-cycling freezer for long-term storage.

By following these best practices, you can maintain peptide purity and ensure consistent, reliable experimental results.