@GillyTheKid great, just wanted to clarify. So, lets compare the two as they are completely in different categories in how and why they work.
With HGH this is a chain peptide that is made up of all 191 amino acids vs MK-677 is like you said a SGA not a SARM, thus meaning it stimulates gherlin and the release of IGF and HGH from the pituitary gland. So, these are 2 different in as how they react in the body.
HGH causes a immediate burst of HGH lastly 8mins in the body then is done and any waste is excreted in the urine vs MK-677 begins working after bypassing the stomach lining then lasting 24hrs in the body causing pulses of hgh to be pushed from the pituitary glands.
So in overall as i am against SARMS i am for SGA’s as it works very well from blood work i have reviewed seeing pulses in HGH and IGF. So my true advice would be as to create new tissue i would combine both to overall saturate the body i would run the following.
6am- 25mg of MK-677 2iu of HGH
12pm 2iu of HGH
4pm 2iu of HGH
**no need for HGH prior to sleep but i would suggest a sleep aid to help push into a REM sleep to push even more HGH while you recover.
This would allow 24/7 saturation with HGH in return constant cellular healing and growth!
Best of luck my friend, hope this helps!