Description
UK brand Crown Peptides sells IGF-1 LR3 Research Peptide 1mg (3 Vials / Kit) as a 3-vial kit, 1 mg per vial and 3 mg altogether. It is listed here at £170.98, which works out at £56.99 per mg.
About the compound
Long R3 insulin-like growth factor-1 (Long R3 IGF-1) is classed as a synthetic IGF-1 analog peptide. Reference data: CAS number 143045-27-6; molecular formula C400H625N111O115S9; 9,117.6 g/mol. You may also see it sold as IGF-1 LR3, Long R3 IGF-1, Long-Arg3-IGF-1. A synthetic analog of human insulin-like growth factor-1 with an Arg substitution at position 3 and an added N-terminal extension.
Lab reports
Crown Peptides has not linked a lab report to this listing so far. We could not find a named testing lab on Crown Peptides’s site. Ask the brand for the certificate for your batch. See the Crown Peptides store page for what the brand says about testing, and the lab reports page for reports that are linked.
UK delivery
Crown Peptides dispatches from inside the UK, which keeps this a UK-to-UK order. Delivery times and couriers are set by the brand and shown in its own terms. Same-day dispatch for weekday orders before 2pm; free UK delivery over £100. Prices are in GBP exactly as the brand charges them.
Buy IGF-1 LR3 in the UK
Ordering IGF-1 LR3 in the UK here takes one checkout: add the listing, pay in crypto, and Crown Peptides posts it from its UK stock. 19 other IGF-1 LR3 listings from UK brands are lined up on the IGF-1 LR3 comparison page. Checkout is in crypto. The payment stays in escrow while the parcel is in transit and goes to the brand only after you confirm it arrived.
For laboratory research use only. Not for human consumption.

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