Although some IGF-1 is made locally in various tissues, our liver is responsible for approximately 75 percent of the IGF-1 that circulates throughout our body.930 So, what happens when we consume a load of protein? Our liver starts pumping out IGF-1 to tell all the cells in our body that it’s time to grow to use up the excess. With so much extra protein to work with, our liver sends the signal to our cells to be fruitful and multiply.
