you should split the injections.. thus 3iu would be the minimum that one should use per session..
but since you are only doing 2iu, do it in the am..
we have several natural spirts of gh that are released by our body throughout the day and night.. the largest dose is released at night while we sleep...
If you inject before you go to bed, you risk suppressing the single most effective and largest dose of GH that your body would product for you for free..
thus we inject am and early afternoon...
While using GH many experience a slight Thyroid suppression (tired) so supplementing something for your thyroid will help with this..
hope that helps..