We offer peptides for sale as Long arginine 3 IGF-1 1.4 mg/pen, 1.3ml pen. Long Arginine 3 IGF-1, or IGF-1 LR3, is a modified form of insulin-like growth factor 1 carrying an arginine substitution and an extended N-terminal sequence. Spectrum Pharma supplies 1.4 mg of it in a 1.3 mL dual-chamber pen. The modifications are the whole point of the analogue: they alter its interaction with the proteins that normally bind IGF-1.
Why the LR3 modification matters
IGF-binding proteins bind native IGF-1 and limit its immediate availability to receptors. The LR3 variant binds those proteins far less strongly, so more of the peptide stays free to reach the IGF-1 receptor. Reduced affinity for binding proteins does not by itself establish the duration of action or a human plasma half-life; it does not change the receptor target. The receptor itself is the same tyrosine kinase that mediates growth, differentiation and metabolic signalling. IGF-1 is not growth hormone: GH is a 191-amino-acid pituitary protein, while IGF-1 is a smaller peptide produced largely in the liver in response to GH. A pen format does not merge them, and an IGF-1 pen is not a somatropin pen with a different label.
The device specification
The listing is 1.4 mg per pen in a 1.3 mL dual-chamber cartridge, refrigerated at 2–8°C. The amount stated for the product describes total content, not the volume moved at any dial position, and the supplied instructions are the only valid reference for delivery settings.
Original product and manufacturer verification
When you buy IGF-1 LR3 from IronJuice Shop, you receive an original product supplied directly by its manufacturer.
Frequently Asked Questions
What is the active substance in Long arginine 3 IGF-1?
The active substance is Long Arginine 3 insulin-like growth factor 1 (IGF-1 LR3). IGF-1 is not growth hormone: GH is a 191-amino-acid pituitary protein, while IGF-1 is a smaller peptide produced largely in the liver in response to GH.
How does IGF-binding-protein interaction differ before I buy IGF-1 LR3?
IGF-1 LR3 binds IGF-binding proteins less strongly than native IGF-1, leaving more peptide available to reach the IGF-1 receptor. IGF-binding proteins bind native IGF-1 and limit its immediate availability to receptors.
What structural or composition features are described for peptides for sale?
Long Arginine 3 IGF-1, or IGF-1 LR3, is a modified form of insulin-like growth factor 1 carrying an arginine substitution and an extended N-terminal sequence.
Which related-substance distinctions matter for peptides for sale here?
IGF-1 LR3 differs from native IGF-1 in its reduced affinity for IGF-binding proteins. Reduced affinity for binding proteins does not by itself establish the duration of action or a human plasma half-life; it does not change the receptor target.
Which names identify the IGF-1 LR3 for sale offered here?
This product is sold as Long arginine 3 IGF-1 1.4 mg/pen, 1.3ml pen.
Which product form is offered within your range of IGF-1 LR3 for sale?
The listing is 1.4 mg per pen in a 1.3 mL dual-chamber cartridge, refrigerated at 2–8°C.
What amount is supplied with the IGF-1 LR3 for sale offered here?
1.4 mg in a 1.3 mL dual-chamber cartridge.
How can I check authenticity if I buy IGF-1 LR3 online?
Check the product's authenticity code on the manufacturer's official website after receipt. Keep the code with the batch and expiry details. Our peptides for sale range includes this product, supplied directly by its manufacturer.
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