I actually did the HGH study when I was about 10. I took one injection every other day for a year. I grew an inch, tops, and besides that, there were no other differences. At 27 years old, I am 5' even, and I am just as strong or weak as any other cf patient is, and I always have been. Now all these stories coming out about what it actually does to the body, make me a little nervous about what might happen to me down the road. I took it for a year and they have *theoretically* linked it to both cancer and diabetes. Of course, like anything else, there are a million conflicting studies on it. The difference with this is that there seem to be very FEW studies on the actual benefits for people with cf, only the could-be risks. I think that it will be bounced around for many more years to come before they decide if it truly helps or not.