Pharmaceutical-grade research peptides for weight loss, anti-aging, performance, recovery, and beyond. Always priced below the competition.
Already priced below competitors. With PEAK20 you're getting up to 35% below market.
Thank you! You'll receive a confirmation email with your tracking information once your order ships.
Everything you need to prepare, dose, and administer your Nexagen peptides correctly. Read this once before you start. It'll save you from making the most common mistakes.
This is NOT regular water. Bacteriostatic water contains 0.9% benzyl alcohol which prevents bacterial growth after you open the vial. You must use BAC water — not sterile water, not tap water, not saline. Available in our accessories section for $12.
Use standard U-100 insulin syringes with a 1ml capacity. The gauge (29G or 31G) refers to needle thickness. 31G is thinner and more comfortable. 29G is slightly easier to draw with. Both work perfectly for subcutaneous peptide research.
70% isopropyl alcohol swabs. Use one to sterilize the rubber top of every vial before inserting any needle. Use a second one to clean the injection site. Let it dry completely before injecting — wet alcohol stings and can carry contamination into the puncture.
Federal and state regulations require proper sharps disposal. Never recap needles and never throw them in regular trash. A 1-quart sharps container handles months of protocols for most research applications.
Nexagen peptides arrive as a lyophilized (freeze-dried) powder. Before use they need to be reconstituted — mixed with bacteriostatic water to create a solution. This process is simple and takes about 2 minutes.
Thoroughly wash both hands with soap and water for at least 20 seconds. This is the most overlooked step and the most important one for preventing contamination.
Use a fresh alcohol swab on the rubber stopper of your peptide vial and on your BAC water vial. Wipe in one direction — do not scrub back and forth. Let both dry completely for 10 to 15 seconds before proceeding.
Insert the needle into the BAC water vial and draw up the amount of water your protocol requires (typically 1ml to 2ml). Pull the plunger slowly and steadily. Remove the needle from the BAC water vial.
Insert the needle into your peptide vial at a slight angle so the water runs down the inside of the glass wall rather than spraying directly onto the powder. Push the plunger slowly and steadily. Never inject fast — this can degrade the peptide.
After adding the water, gently swirl the vial between your palms or slowly roll it back and forth. The powder will dissolve on its own within 30 to 60 seconds. Never shake the vial — shaking creates bubbles and can break down the peptide bonds.
Your reconstituted peptide should be clear and colorless (most peptides) or very slightly yellow (some like BPC-157 and TB-500 are naturally slightly colored). If you see cloudiness, floating particles, or unusual color — do not use it.
Write the date of reconstitution on your vial with a marker or label. Place immediately in the refrigerator (2°C to 8°C / 36°F to 46°F). A reconstituted peptide stored properly in the refrigerator is typically stable for 28 to 30 days.
Select your peptide below to auto-fill the fields, or enter values manually. Results update instantly.
All Nexagen peptides are administered subcutaneously (SubQ) — meaning just under the skin into the fatty tissue. This is different from intramuscular (IM) injection. SubQ is shallow, comfortable, and easy to self-administer.
Rotate between sites to prevent tissue buildup. The abdomen (around but not on the navel) is the most popular site — plenty of fat tissue and easy to access. Alternate sides each injection.
Swab the rubber top of your reconstituted peptide vial with an alcohol swab. Let it dry. Insert the needle and draw up your calculated dose. Remove any air bubbles by flicking the syringe gently and pushing the plunger up until a tiny drop appears at the needle tip.
Select a site with adequate subcutaneous fat — stomach, thigh, or upper arm. Wipe the area with an alcohol swab and let it dry completely. A circle about the size of a golf ball defines your injection zone.
With your non-dominant hand, gently pinch a fold of skin about 1 inch wide. Hold the syringe like a dart in your dominant hand. Insert the needle at a 45-degree angle (or 90° if you have significant fat tissue) with a quick, confident motion. Hesitation causes more discomfort than speed.
Release the skin pinch. Push the plunger down slowly and steadily over 5 to 10 seconds. Do not rush. A slow steady injection is more comfortable and prevents the solution from backing up around the needle.
Pull the needle out at the same angle you inserted it. Apply light pressure with a clean alcohol swab or cotton ball for 10 to 15 seconds. Do not rub — this can cause the solution to disperse unevenly or cause irritation.
Place the used needle immediately into your sharps disposal container. Never recap, never reuse, never throw in regular trash. A full sharps container can be dropped off at most pharmacies or medical waste collection sites.
| Condition | Lyophilized (Dry Powder) | Reconstituted (Mixed) | Status |
|---|---|---|---|
| Refrigerator 2°C to 8°C / 36°F to 46°F |
6 to 12 months | 28 to 30 days | Optimal |
| Freezer -20°C / -4°F |
12 to 24 months | ❌ Never freeze | Powder Only |
| Room Temperature 20°C to 25°C / 68°F to 77°F |
2 to 4 weeks (avoid) | 24 to 48 hours max | Avoid |
| Travel / Transport With cold pack |
Up to 24 hours fine | Up to 24 hours with cold pack | Use Cold Pack |
| Direct Sunlight / Heat > 30°C / 86°F |
Degrades rapidly | Degrades rapidly | Never |
GLP-1 class peptides (Semaglutide, Tirzepatide, Retatrutide) follow a titration protocol — starting low and increasing gradually over time. This is essential for managing tolerability. Jumping to a high dose immediately causes unnecessary nausea and discomfort.
Begin at the lowest available dose. For Semaglutide this is typically 0.25mg weekly. For Tirzepatide this is typically 2.5mg weekly. For Retatrutide this is typically 1mg to 2mg weekly. Inject once per week on the same day each week.
If the starting dose is well tolerated (minimal nausea, manageable appetite suppression), increase to the next dose increment. Typical increases: Semaglutide 0.5mg, Tirzepatide 5mg, Retatrutide 2mg to 4mg weekly.
Continue increasing every 4 weeks until you reach your target maintenance dose or the dose where you experience optimal results with acceptable tolerability. There is no requirement to reach a maximum dose — use the dose that works for your research protocol.
Nexagen was built on one simple observation — the peptide market was charging too much, explaining too little, and treating customers like they couldn\'t handle the truth.
We got tired of seeing the same thing over and over — overpriced compounds, vague product descriptions, zero education, and a checkout process that made people feel like they were doing something wrong just for wanting to optimize their health.
Nexagen was built differently. We went directly to the source, locked in wholesale pricing that nobody else can touch, and built an experience that actually teaches you what you\'re buying, why it works, and how to use it correctly.
The result is a catalog of 50+ research compounds priced below every major competitor, backed by the most comprehensive education layer in the space, and supported by tools that help you build the right protocol for your specific goals.
To make premium research compounds accessible, affordable, and understandable — for serious people who are serious about living at their peak.
We\'re not here to sell you something and disappear. We\'re here to help you understand what you\'re working with, build a protocol that actually fits your goals, and come back when it\'s time to reorder because the results speak for themselves.
Browse our full catalog or take the quiz to build your personalized protocol.
Please read this disclaimer carefully before purchasing any product from Nexagen LLC.
All products sold by Nexagen LLC are intended strictly for in vitro research and laboratory use only. These products are not drugs, supplements, or any other consumer product and are not intended for use in humans or animals.
These statements and products have not been evaluated by the Food and Drug Administration. Nexagen products are not intended to diagnose, treat, cure, or prevent any disease, condition, or health concern.
You must be 18 years of age or older to purchase from Nexagen LLC. By completing a purchase you confirm that you meet this age requirement and that you are purchasing solely for legitimate research purposes.
The purchaser assumes full responsibility for compliance with all applicable local, state, federal, and international laws and regulations regarding the purchase, possession, and use of these research compounds. Nexagen LLC makes no representations regarding the legality of these products in any specific jurisdiction.
Nothing on this website — including product descriptions, protocol examples, dosing guides, or any other content — constitutes medical advice. All content is provided for informational and educational purposes only. Always consult a qualified healthcare professional before making any health-related decisions.
Nexagen LLC, its owners, employees, and affiliates shall not be held liable for any damages, losses, or adverse outcomes arising from the purchase, possession, or misuse of any product sold through this platform.
Questions regarding this disclaimer may be directed to our team via the page.
Last updated: June 2026. Nexagen LLC is committed to protecting your privacy.
When you place an order we collect your name, email address, shipping address, and payment information. We also collect basic usage data (pages visited, time on site) to improve your experience.
Your information is used solely to process and fulfill your order, communicate order status, and improve our services. We do not sell, rent, or share your personal information with third parties for marketing purposes.
All payment information is encrypted using industry-standard SSL technology. We do not store full credit card numbers on our servers. Payment processing is handled by PCI-compliant third-party processors.
Your shipping address is shared only with our shipping partners for the purpose of delivering your order. We use discreet packaging — no company name or product details appear on the outside of any shipment.
By placing an order you consent to receive order confirmation and shipping notification emails. You may opt out of promotional communications at any time by clicking the unsubscribe link in any email.
This site uses cookies to maintain your shopping cart and improve your browsing experience. You may disable cookies in your browser settings, though this may affect site functionality.
Privacy questions may be directed to our team via the page.
Questions about an order, a product, or anything else? We\'re here to help.
Are you a med spa, TRT clinic, wellness center, or health professional looking for a reliable research compound supplier? Let\'s build something together.
Fill out the form below and a member of our team will reach out within 48 hours.
Earn 25% commission on every sale you refer. No cap. No gimmicks. Just the most generous affiliate structure in the peptide space.
See how much you could earn based on your audience size.
All niches welcome — fitness, biohacking, longevity, wellness, lifestyle. If your audience cares about their health, they\'re our audience too.