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Labcorp
Broadest draw-site network nationwide.
Quest Diagnostics
Same-day appointments in most metros.
IGF-BP3 (Insulin-like Growth Factor Binding Protein 3) is the main binding protein for IGF-1 in circulation. It regulates the availability and activity of IGF-1, playing an important role in growth and cell development, and is often measured alongside IGF-1 to assess growth hormone function.
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