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PEGylation Extends Peptide Half-Life from Minutes to Days
PEGylation surrounds peptides with a flexible polyethylene glycol layer to boost half-life from minutes to hours or days. This process increases hydrodynamic size, blocks proteases, and limits renal clearance while preserving receptor affinity. Such changes support less frequent dosing, improve patient adherence, cut costs, and enhance real-world efficacy.
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Step-by-step protocols for reconstituting lyophilized research peptides, including solvent selection, concentration calculations, and common mistakes to avoid.
FDA Eyes Lifting Restrictions on Cosmetic Peptides
The FDA shows signs of reevaluating restrictions on cosmetic peptides like GHK-Cu and SNAP-8, which face limits in compounding pharmacies despite use in low-concentration skincare products. These compounds offer benefits in skin rejuvenation and wound healing but remain on restricted lists under Section 503A. Recent agency feedback requests hint at possible changes to improve access.