IGF-1 LR3 (Long R3 Insulin-like Growth Factor 1) is a peptide hormone that plays a crucial role in muscle growth, recovery, and overall performance. Let’s delve into the details:

1. Purpose and Function:
   • IGF-1 LR3 is a recombinant analog of insulin-like growth factor.
   • It contains the complete human IGF-I amino acid sequence with a substitution of Arg for Glu3.
   • This modification enhances its potency and effectiveness.
   • IGF-1 LR3 is used as a growth factor supplement in serum-free or low serum cell culture.
2. Key Features:
   • Increased Stability: IGF-1 LR3 remains active up to 120 times longer compared to native IGF-1.
   • Anabolic Effects: It promotes muscle hypertrophy and protein synthesis.
   • Lower Risk: While providing benefits similar to insulin, it carries lower risk.
3. Dosage and Administration:
   • Recommended dosage ranges from 20 mcg (0.02 mg) to 100 mcg (0.1 mg) once daily.
   • Administer for approximately six weeks, followed by a break of about 20-40 days before starting a new cycle.
   • For solutions at a concentration of 1 mg/ml, consider adding a carrier protein like bovine serum albumin (BSA) to minimize adsorption to surfaces.