In a recent trial conducted in California, researchers investigated the effects that a recombinant human growth hormone had on the immune systems of 9 healthy men in their 50’s and 60’s. Over the course of one year, on average the trial members shed 2.5 years off of their ‘biological age’. It’s hoped that this newly acquired information regarding the effects these three drugs have on the body could be beneficial for people with under active immune systems, the elderly, and research into infectious diseases, cancer, and aging in general.