what is igf-1 ?

IGF-1, or Insulin-like Growth Factor 1, is a hormone produced primarily by the liver as a response to growth hormone stimulation. It plays a significant role in childhood growth and continues to have anabolic effects in adults. IGF-1 supports cellular growth, muscle development, and regeneration, and is critical for maintaining tissues in the body. It also impacts memory and cognition positively, particularly after exercise, enhancing learning and potentially memory capacity. However, its actions in humans don't include promoting neurogenesis (i.e., the production of new neurons), which is a process observed in animals but not in humans 1.

Moreover, IGF-1 is involved in the regulation of the hair growth cycle, particularly extending the growth phase of hair follicles, thereby influencing hair density and longevity 2. Additionally, the activity of IGF-1 in the body can be affected by insulin sensitivity, highlighting the importance of maintaining a healthy metabolic state to optimize its functions 3.

This hormone is significant in various biological processes including growth, hair health, and cognitive functionality, and its effect can vary based on factors like exercise and metabolic health.