I am using gh (loving it!) and here's what I do.
1. You want to use as much water as reaqsonably possible because no matter what there is .1ml waste on each syringe, so using 2-3 cc of water (as opposed to 1) reduces that from 10% waste down to 3-5% waste.
2. Do the math to decide what size each inject would be to compute how much water to use. If you have 8iu and you want .5iu injects, then you are trying to get 16 injects from one syringe. So if you make each inject .2cc, then you would use 3.2cc water (too much for a 3-cc syringe). To get .1cc injects, use 1.6cc water.
Another example: I have gh that comes in 18iu vials. I am doing 4.5iu injects, meaning each full syringe gives me 4 shots. So I use 2.4cc of water (an almost full syringe, minimized waste) and each shot is .6cc, easy to measure.
NOTE: Why are you doing .5iu injects of gh? That is a very low gh dose. I'm not sure if you would see any results at all from that low a dose.
3. Use a largish (20g) pin & syringe to measure the water and inject it into the gh. It is important not to blast the dry gh with a jet of water as gh is fragile and can be destroyed by that. Let the water drip onto the size of the vial and run down into the gh.
4. Mix the gh with the water by swirling (do not shake for the reasons just given)
5. Turn it upside down and slowly draw the gh back into the syringe. The pressure inside the gh vial makes this easy, just control the speed an which you draw. If you suck the gh out too fast, the turbulence created inside the pin can also damage or destroy the gh.
6. With all the mixed gh inside the syringe, remove and discard the 20g drawing pin and replace with a 25g 1/2" pin
7. If you do multiple injects using the same pin (which I do) be sure to sterilize the pin before and after each inject with an alcohol swab. Not doing this meticulously caused me to get sick once. Let the alcohol evaoprate before your inject so it doesn't sting.
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