When growth hormone levels rise, the liver produces Insulin-like Growth Factor 1 (IGF-1)
Kim YH, Noh JR, Hwang JH, Kim KS, Choi DH, Kim JH, Moon SJ, Choi JH, Herault Y, Lee TG, Choi HS, Lee CH
Many researchers run these peptides together for potentially enhanced GH release: CJC-1295 DAC at 12 mg/week (12 injections, or up to ~3 mg/week advanced) and Ipamorelin at 300700 mcg/day (13 daily injections)
The good news is that vitamin B12 levels can be easily managed with proper supplementation
If you want to dose higher, after 2-4 days, whenever you feel comfortable, up the dose to 500mcg
For food sources you need to think about eating nose to tail