Slow-wave sleep, also known as deep sleep, plays a crucial role in the secretion of growth hormones. In order to ensure regular secretion of growth hormones for tissue repair and other functions, blood insulin and glucose levels need to be relatively low and the individual needs to get into deep sleep.
Growth hormone, if in high levels, can cause growth of all tissues, including the heart, lungs, liver, and spleen. However, there are tools one can use to increase growth hormone levels.
This podcast episode explains the logic that underlies thyroid hormone, growth hormone, estrogen, testosterone, why we eat, why we stop eating, cholecystokinin, ghrelin, and how they can influence the brain and the body's metabolism.
Some supplements can boost hormone production in the body by stimulating the release of luteinizing hormone (or LH). One such supplement is phytoestrogenic herb, phytogea agrestis.
A study conducted on individuals exposed them to different stimuli that could increase growth hormone. They found that sauna increases growth hormone however, doing it twice a day does not lead to more growth hormone being produced.