In 1990 a landmark study was published in the New England Journal of Medicine. It showed remarkable improvement in a dozen elderly men who were injected with growth hormone three times a week for six months. Their muscle mass and bone density increased and their fat decreased. The six months of hormones reduced aging by ten to twenty years.
In another study, published in the Journal of the American Medical Association in 2002, human growth hormone with either testosterone in men or estrogen and progesterone in women was given for six months. The good news is that muscle increased and fat decreased, as would be expected with three exercise sessions a week. The bad news is that diabetes increased and participants had leg swelling, acne, weight gain, arthritis, muscle pain, and carpal tunnel syndrome from the hormone. Ten percent of men's breasts grew. The study concluded that growth hormone was not "ready for prime time." It is considered experimental until the complex interactions with other hormones and body systems are better understood. Still other studies with growth hormone have shown that breast and prostate cancers are more likely in people taking growth hormone.
W. Glenn Lyle, M.D., a Raleigh, North Carolina, plastic surgeon, has reviewed the growth hormone literature for the Plastic Surgery Educational Foundation. He says that information supporting human growth hormone usually comes from non-peer-reviewed studies and is often found on websites and in lay books. He concluded that growth hormone replacement doesn't increase lifespan in animals or humans.
Find out more about this book:Straight Talk about Cosmetic Surgery (Yale University Press Health & Wellness)