Injectable B12 has been used safely by doctors for decades and is one of the most common medical injections out there
For instance, OGDH shares the cluster 3d with PDHA1 in Figure 5A, while in Figure 5B OGDH occupies the same cluster 5c with PDHB, while PDHA1 is moved to the DHTKD1-comprising cluster 5d
By dosage, the mean changes were: 500 mcg: 127% 750 mcg: 176% (single study) 1,000 mcg: 280% 1,500 mcg: 310% 2000 mcg: 260% 5,000 mcg: 62% While 1,500 mcg of vitamin B12 showed the highest average increase, the effect plateaued or declined at higher doses, suggesting a possible saturation of absorption pathways
Retatrutide and GHK-Cu operate on entirely separate biological systems
For longer tapering schedules, separate bottles give you more control