Generic Peptides MET5 Enkephalin 20 mg and 40 mg Research Vials

Generic Peptides MET5 Enkephalin 20 mg and 40 mg Research Vials

Generic Peptides MET5 supplies [Met5]-enkephalin as lyophilised 20 mg and 40 mg vials. The peptide is the methionine enkephalin sequence Tyr-Gly-Gly-Phe-Met, a copy of the human endogenous pentapeptide and an agonist of the delta-opioid receptor, so work with it is laboratory work: no regulator has approved enkephalin as a medicine and no human dose has been set. MET5 enkephalin for sale from a GMP manufacturer with a Certificate of Analysis on file.

• [Met5]-enkephalin (MENK) - 20 mg or 40 mg per lyophilised vial
• Endogenous opioid pentapeptide, delta-opioid receptor agonist
• In vitro plasma half-life under 2 minutes; reference range 4.2 to 39 minutes
• GMP-manufactured, HPLC-verified, COA on file per batch

Variant Comparison

Both vials hold the same peptide and differ only in the amount of powder.

A 20 mg vial with 2 ml of solvent gives 10 mg per ml, and the same vial with 4 ml gives 5 mg per ml, so 0.1 ml on a U-100 syringe holds 1 mg or 500 mcg. The 40 mg vial with 4 ml reaches the same 10 mg per ml.

How MET5 Works

Enkephalins are the body's own opioid peptides, and the methionine variant binds delta-opioid receptors in the nervous system. Research models examine analgesia, neurotransmitter release, gut motility and immune cell behaviour, and the peptide also serves as a reference standard when synthetic opioid analogs are compared. Turnover is extremely fast: in plasma it is broken down in under two minutes in vitro, and the reference profile gives a 4.2 to 39 minute range, so laboratory designs use short exposure windows rather than steady levels.

Reconstitution and Storage

Add bacteriostatic water down the wall of the vial and do not shake it. Keep the powder cold and dry and the solution at 2-8 C without freezing, because short peptides lose activity in freeze-thaw cycles. Small volumes are measured with a U-100 syringe, where 0.1 ml equals 10 units. The same arithmetic applies to the other neuro and immune vials on this line, such as Selank, DSIP and Thymalin.

Quality & Authenticity

Every batch is produced under GMP conditions and checked by independent HPLC, with the Certificate of Analysis held for the batch. Reported findings are mainly local reactions where the peptide is applied, plus opioid-type effects such as a reduced pain response and central nervous system changes, which are a class effect of opioid receptor agonists not characterised in humans for this peptide. As an unapproved substance, enkephalin falls under class S0 of the WADA prohibited list.

For laboratory research only. Consult a healthcare professional before use.

Consult a healthcare professional before any cycle. Where a stack suppresses natural testosterone, PCT is required. Doses are common community protocols.