IGF-des(1-3), also known as Des(1-3)IGF-I, is a truncated version of insulin-like growth factor-1 (IGF-I) that lacks the first three amino acids at its N-terminus. This modification makes it more potent than standard IGF-I, both in vitro and in vivo. \
Truncation:
Des(1-3)IGF-I is created by removing the tripeptide Gly-Pro-Glu from the N-terminus of IGF-I. Increased Potency:
The absence of these amino acids leads to reduced binding to IGF-binding proteins, resulting in increased potency, roughly 10-fold, in stimulating cell growth and hypertrophy. Clinical Potential:
Des(1-3)IGF-I may have clinical applications in treating catabolic states and inflammatory bowel diseases. Sports Doping:
Des(1-3)IGF-I is listed as a prohibited substance in sports, alongside other IGF-I analogs like LongR3-IGF-I and R3-IGF-I, according to the National Institutes of Health (NIH) (.gov).
In summary, Des(1-3)IGF-I is a truncated form of IGF-I with increased potency due to reduced binding to IGF-binding proteins. It has been shown to stimulate cell growth and hypertrophy, and may have potential clinical applications in specific conditions, while also being a prohibited substance in sports.
Daily dose : 50-100mcg, 2 times a day, 2 hours before or after exercise, for 4 to 6 weeks. Pause for 4 to 6 weeks and then repeat the cycle
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