I started at 10 units based off of this because the GHK does leave some PIP. I ran this for approximately 3 weeks then bumped it up.
GLOW KIT CHEAT SHEET
Vial: Single combo vial
Contents: GHK-Cu 65 mg BPC-157 15 mg TB-500 10 mg
Total: 90 mg
Reconstitution: 2.5 mL BAC
CONCENTRATION
36 mg/mL (total blend)
Per mL:
GHK-Cu: 26 mg
BPC-157: 6 mg
TB-500: 4 mg
INSULIN SYRINGE CONVERSION
5 units (0.05 mL)
→ GHK 1.3 mg
→ BPC 300 mcg
→ TB 200 mcg
8 units (0.08 mL)
→ GHK 2.1 mg
→ BPC 480 mcg
→ TB 320 mcg
10 units (0.10 mL)

→ GHK 2.6 mg
→ BPC 600 mcg
→ TB 400 mcg
12 units (0.12 mL)
→ GHK 3.1 mg
→ BPC 720 mcg
→ TB 480 mcg
15 units (0.15 mL)
→ GHK 3.9 mg
→ BPC 900 mcg
→ TB 600 mcg
I'm currently taking 10units a.m., and 15units p.m. I have some pretty arthritic joints and this seems to be neutralizing it. I'm on my feet all day from the moment I wake, and strange enough my legs don't ache as they once did.
I also have a pulled muscle in my right scapula area. You can see it when I push my arms forward. My wife pins strength into the area, and I can honestly say it's significantly better.
On the GHK side, my skin is looking much clearer, honestly less bag under my eyes. I also have relatively dry skin even on heavy AAS. Often I would be itchy after exiting the shower. This has completely subsided.
Ultimately I like the blend, but I will say if your trying to dose BPC/TB higher, the possibility of having separate compounds will be far more appealing.