I elaborated on the point further:

GHRP's & GHRH's

GHRP's & GHRHs

GHRP = Growth Hormone Releasing Peptide
GHRH = Growth Hormone Releasing Hormone

Types of GHRP's and their function in the human body:

GHRP's release a pulse of GH in the human body.

• Hexarelin:
• GHRP-6: A messy compound, since it induces a wide array of sides other than a pulse of GH. These sides include intense hunger and gastric mortality, while also effecting cortisol and prolactin. This is a first generation GHRP.
• GHRP-2: My personal preference (alongside Ipamorelin), a second generation peptide, which is much less messy than GHRP-6, with the added benefit of a greater GH spike. No gastric mortality and marginally less hunger with GHRP-2.It can also have an effect on the normal range of your cortisol and prolactin levels.
• Ipamorelin: Not a messy compound at all. A third generation peptide. It does not release as much GH as GHRP-2, but causes little hunger or gastric mortality and also has little effect on cortisol and prolactin.

Types of GHRH's and their function in the human body:

GHRH's amplify the GH pulse which GHRP's release.

• Mod GRF (1-29)
• CJC 1295 (w/out DAC)

It's not necessary to alternate every 2 weeks although you can. You could alter every pin. On the basis of pinning 3x a day i would recommend (remember to always shoot up peptides on an empty stomach):

• Morning (dose 1): GHRP-6 (or Hex) w/Mod GRF1-29 in morning. This will help extend the gh release you were having from rest and keep your appetite up in the morning.
• Gym (dose 2): GHRP-2 w/Mod GRF1-29 post workout and then proceed to eat a huge meal. This GH boost will be very effective at this time and the large meal will be great for adding size.
• Night (dose 3): shoot Ipamorelin w/Mod GRF1-29 for an extended GH release.

I wouldn't recommend Hexarelin, simply because it's a primitive GHRP and since there's a very limited cost associated with these peps then i would certainly thing about buying some GHRP-6, GHRP-2 and Ipamorelin and use them in the way i described them above.

This table shows how the young respond in relation to the old. The young are more responsive than the elderly, however, the elderly respond better to GHRP-2 than to Hexarelin.