Pinchas Cohen, M.D.

The IGFs are important metabolic and mitogenic factors involved in cell growth and metabolism. IGFs are produced in the liver, in bone cells, and in other tissues, at least partially under GH control. Circulating IGFs have direct (endocrine) effects on somatic growth and on the proliferation of many tissues and cell types, both in vivo and in vitro. However, the IGFs are also thought to be significant autocrine-paracrine factors involved in cellular proliferation. Locally produced IGFs have been demonstrated in bone, brain, prostate, muscle, mammary tissue, and other sites, where they are considered to be responsible for tissue growth and differentiation.  About 80 percent of serum IGF-I levels are hepatic in origin as evident from specific liver targeting of IGF-I.[7]
 

Catherine Wood - Cornell Presidential Research Scolars 
Ag & Life Sciences 2003 
"The gene coding for Insulin-like Growth Factor II, or Somatomedin A, is a promotant of growth and development."

Barbara Brewitt, Ph.D.
While we are talking about recombinant IGF2, the homeopathic preparation  activates biological effects via a different route. This is a new area of research, so there is much work to be done. I do not have all the answers, however we are beginning to shed light on biological, physiological and psychological benefits of homeopathic growth hormone and growth factors for humans. These medicines are safe and non-toxic and available to health conscious consumers.