What is IGF-1 LR3?
IGF-1 LR3 is a modified insulin-like growth factor with an extended half-life, studied for muscle-cell growth and repair signaling.

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Long-acting IGF-1 analog.
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IGF-1 LR3 is a modified insulin-like growth factor with an extended half-life, studied for muscle-cell growth and repair signaling.
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1
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Long R3 — an 83-amino-acid analog with substitutions that extend its half-life.