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Plasma clearance of radiolabelled IGF-1 in the late gestation ovine fetus
The per-vial reference pages for example the tesamorelin 10 mg vial reference, the tesamorelin 5 mg and tesamorelin 20 mg references, and the sermorelin 10 mg and sermorelin 5 mg references describe reconstitution measurement for research use only, not personal or therapeutic dosing
Lyophilized vs liquid peptide stability Lyophilized (freeze-dried) powder: Most peptides sold in this form Moisture removed via freeze-drying Very stable when dry Can last years if stored properly Requires reconstitution before use Lyophilized stability: Freezer (-20C): 2-5+ years for most peptides Refrigerator (2-8C): 1-2 years typical Room temperature: Weeks to months (varies by peptide) Key factor: Keeping it DRY (moisture is enemy) Liquid (reconstituted) peptides: Peptide dissolved in water Much less stable than powder Water enables hydrolysis Bacterial contamination risk higher Limited shelf life Liquid stability: Refrigerated with bacteriostatic water: 28-30 days typical Refrigerated with sterile water: 5-7 days maximum Room temperature: Hours to 1-2 days only Frozen (reconstituted): DO NOT FREEZE liquid peptides Key principle: Keep peptides as dry powder until needed, then use reconstituted solution within recommended timeframe
In the EU, IPBC concentration limits are set at 0.02% in rinse-off products and 0.01% in leave-on products
