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Description
Oral supplementation works because approximately 1% of an oral dose is absorbed through passive diffusion, bypassing the need for intrinsic factor

10.1096/fj.09-133223 78 HeL.WhistlerJ

IGF-1 LR3 bypasses this because it doesnt bind IGFBP-3 or other binding proteins effectively

Effect of recombinant human growth hormone on the muscle strength response to resistance exercise in elderly men

Evaluation of Factors Associated With Favorable Outcomes in Adults With Bell Palsy
