HGH and peptides

HGH and peptides sit outside the traditional steroid framework but are central to advanced cycles, anti-ageing protocols, and on-cycle testicular maintenance. Unlike anabolic steroids, which directly bind to androgen receptors, these compounds work through entirely different pathways: HGH stimulates IGF-1 production for systemic recovery and fat loss, HCG mimics luteinising hormone to keep the testes producing testosterone during a cycle, and Melanotan 2 acts on melanocortin receptors for pigmentation and libido.

Optimum Biotech UK stocks three core compounds in this category: GenXtropin (191aa somatropin), GenX-HCG (human chorionic gonadotropin), and GenX-MT2 (Melanotan 2). All three are reconstitution-required peptides shipped as lyophilised powder for stability. Every batch is QR-verified with an independent assay on file. Orders placed before our daily cut-off ship the same working day via Royal Mail Tracked 24 in plain unbranded packaging.

Most Popular HGH & Peptides

How HGH and Peptides Work

Peptides are short chains of amino acids that act as signalling molecules. They tell specific receptors in the body to release hormones, trigger repair processes, or alter pigmentation. Unlike anabolic steroids, they aren’t direct hormone replacements, they’re messengers that activate your body’s own systems.

Growth Hormone (Somatropin)

GenXtropin is recombinant 191-amino-acid somatropin, the same sequence as natural human growth hormone. It binds to GH receptors in the liver and peripheral tissue, stimulating IGF-1 production. Effects build slowly over 8 to 12 weeks: fat loss (particularly visceral fat), improved sleep quality, faster soft tissue recovery, joint comfort, and skin quality. HGH does not produce dramatic muscle gains by itself, but it amplifies the results of any anabolic protocol run alongside it.

HCG (Human Chorionic Gonadotropin)

GenX-HCG is structurally similar enough to luteinising hormone (LH) that the testes can’t tell the difference. During a suppressive steroid cycle, the body stops producing LH, the testes stop producing testosterone, and they shrink and lose function. HCG injected on-cycle keeps the testes active, prevents atrophy, and makes PCT recovery faster and more reliable. Typically run at 250 to 500iu twice per week during the cycle, stopped 10 to 14 days before PCT begins.

Melanotan 2

GenX-MT2 is a synthetic analogue of alpha-melanocyte-stimulating hormone. It activates melanocortin receptors, primarily MC1R (skin pigmentation) and MC4R (libido and appetite). The pigmentation effect requires UV exposure to develop, the libido and appetite effects are dose-dependent and noticeable within hours of injection. Standard loading protocol is 0.25 to 0.5mg per day until desired tan develops, then maintenance dosing 1 to 2 times per week.

Choosing the Right Compound

For Fat Loss and Recovery

GenXtropin (HGH) at 2 to 4iu per day, run for a minimum of 12 weeks to see meaningful results. Most users dose in the morning on empty stomach or split into two doses (morning and pre-bed). HGH stacks well with any anabolic cycle but works just as well on its own for body recomposition and anti-ageing applications.

For On-Cycle Testicular Maintenance

GenX-HCG at 250iu twice per week throughout the cycle. Prevents testicular atrophy, maintains fertility markers, and makes the post-cycle restart faster. Critical for cycles longer than 8 weeks or for users planning to have children within the next 12 months. Stop HCG 10 to 14 days before starting PCT so the HCG has cleared before Clomid/Nolvadex begins.

For Tanning and Libido

GenX-MT2 loading at 0.25mg per day for 10 to 14 days with daily UV exposure, then maintenance at 0.5mg twice per week. Initial doses can produce nausea and facial flushing, starting low and ramping up helps. Effect on libido and appetite is immediate, the tan develops over weeks.

Reconstitution and Storage

All three compounds ship as lyophilised powder inside sealed vials and need to be reconstituted with bacteriostatic water before use. Bacteriostatic water is not included and must be sourced separately, most UK users buy it from medical supply sites. Once reconstituted:

HGH (GenXtropin): use within 14 days, stored refrigerated at 2 to 8°C. Do not freeze.

HCG (GenX-HCG): use within 30 days, stored refrigerated. Loses potency rapidly at room temperature.

Melanotan 2 (GenX-MT2): use within 30 days, stored refrigerated.

Unreconstituted vials are stable at room temperature for several months but refrigeration extends shelf life significantly.

Authenticity and Lab Testing

Peptide counterfeiting is widespread in the UK market because the lyophilised powder format makes visual inspection useless. Underdosed vials, wrong sequences, and bacterial contamination are common in unverified supply. Every Optimum Biotech peptide vial carries a unique QR code on the label. Scanning it confirms the batch came from our manufacturing run and links to that batch’s independent assay report showing peptide identity, purity by HPLC, and dose per vial.

Standing policy: HPLC-verified purity testing per production batch, plus mass spectrometry confirmation for HGH to verify the 191aa sequence. Reports are kept on file and provided on request.

UK Delivery

All HGH and peptides ship from UK stock with cold-chain considerations for HCG and reconstituted-shelf-life expectations documented inside the package. Same-day dispatch on Royal Mail Tracked 24 for orders placed before the daily cut-off, with the tracking number emailed automatically at the moment of dispatch. Plain unbranded packaging, no labels or product descriptions on the exterior. Full terms on our Shipping Policy page.

HGH & Peptides FAQ

How is HGH different from steroids?

HGH is a polypeptide hormone, not a steroid. It doesn’t bind to androgen receptors and doesn’t directly build muscle. Instead it stimulates the liver to produce IGF-1, which then drives recovery, fat metabolism, and connective tissue repair. Effects develop slowly over 8 to 12 weeks rather than the days-to-weeks timeline of anabolic steroids. HGH is non-suppressive and doesn’t require PCT.

Do I need to run HCG on every cycle?

Not strictly, but it’s strongly recommended for any cycle longer than 8 weeks, any cycle using long-ester compounds, and any user planning fertility within the next 12 months. HCG keeps the testes active during suppression, which means less atrophy, faster post-cycle restart, and a more reliable PCT. The downside is added cost and an extra injection twice per week.

How long does HGH take to work?

Initial effects (better sleep, faster recovery, joint comfort) show up within 4 to 6 weeks. Fat loss and body composition changes need 8 to 12 weeks minimum, ideally 16 to 24 weeks for full effect. HGH is not a short-cycle compound. Most users run it for 6 months to a year continuously, then take a break.

What dose of HGH should I start with?

2iu per day for the first 4 weeks to assess tolerance and check for side effects (water retention, numb hands, joint stiffness). After that most users move to 3 to 4iu per day for body composition goals. Doses above 5iu per day enter performance territory and significantly increase the risk of long-term insulin resistance and IGF-1-related side effects. Bloodwork covering fasting glucose, HbA1c, and IGF-1 every 3 months is standard practice.

How do I reconstitute peptides?

Inject bacteriostatic water slowly down the inside wall of the vial (not directly onto the lyophilised powder, which can damage the peptide). Swirl gently until fully dissolved, do not shake. Once dissolved, store refrigerated. The amount of bacteriostatic water used determines the concentration: more water means easier dosing of small amounts but shorter shelf life. Standard reconstitution volumes are 1ml for HGH, 2 to 3ml for HCG, and 1ml for Melanotan 2.

Can I run HGH alongside a steroid cycle?

Yes, and that’s where most users see the strongest results. HGH amplifies recovery, fat loss, and connective tissue repair while the anabolic compounds drive muscle growth. The combination is the foundation of most “advanced” cycles. No interactions or contraindications, but the cost adds up.

How do I check my peptide is authentic?

Every Optimum Biotech peptide vial has a unique QR code printed on the label. Scan it with any phone camera. The link should resolve to a batch verification page on our domain showing HPLC purity testing and (for HGH) mass spec confirmation of the 191aa sequence. If the QR scan fails, takes you elsewhere, or the vial has no QR code at all, the product is not ours.

What’s the legal position on HGH and peptides in the UK?

HGH (somatropin) is a Prescription Only Medicine under the Human Medicines Regulations 2012. Personal possession and personal use are legal in the UK provided the product is in a medicinal form, but importing or supplying to others is illegal. HCG is also a Prescription Only Medicine with the same rules. Melanotan 2 is unlicensed in the UK but not a controlled substance. All products are sold for personal use only. See our Legal Disclaimer for full details.

What if my parcel doesn’t arrive?

Royal Mail Tracked 24 has a high next-day delivery rate but occasional delays happen. If tracking shows no movement after 3 working days from dispatch, contact us with your order number. Lost-in-transit replacements are covered under our Refund Policy.