Research has shown that an increase of IGF1 in the bloodstreams spurs growth and regeneration by the body’s cells particularly among skeletal muscle cells, where it is shown to positively impact
muscle strength, size and efficiency. Specifically, it contributes to skeletal
muscle growth (hypertrophy) by provoking the synthesis of protein while helping to block muscle atrophy.
Other cells that are affected by IGF1 include cartilage, liver, kidney, skin tissue, lung, nerve and bone.