The effectiveness of HGH supplements can be measured by doing randomized double-blind placebo-controlled IGF-1 clinical trials.

There are now many different products on the market, yet only a few have undergone double-blind placebo IGF-1 clinical trials to measure their effectiveness at actually increasing human growth hormone in the body. Of those few brands the clinical studies done on our ProBLEN formula showed the best results, and only our studies were done independently.

The reason the clinical studies measure a serum IGF-1 level instead of an HGH level is because growth hormone remains in the bloodstream for only a couple of minutes after being released by the pituitary gland. It is quickly taken in by the liver and so it cannot be accurately measured with a random blood draw. To measure HGH a very detailed, time consuming, and risky IV HGH stimulation test must be done, and even then how accurate the results are is a question. For more information about blood tests see our article: Blood Tests To Accurately Measure HGH and Diagnose Growth Hormone Deficiency

So, since HGH stimulates IGF-1 release research doctors will check the IGF-1 level of the test subjects since it is more stable in the blood and can provide important information related to the amount of growth hormone the pituitary gland is releasing.

For more information:

ProBLEN HGH Independent Double-Blind IGF-1 Clinical Study Results

The Gold Standard For Measuring HGH Supplement Effectiveness

Client's IGF-1 Level Increased 387% in Three Months!

Lisa Wells, RN