Some competitive athletes use it to target final stubborn areas during cutting phases, and there's anecdotal support for this but the dramatic results seen in higher-body-fat research subjects won't replicate at 12% BF
"MultiBoost with B12 provides beef and dairy producers with a convenient way to boost essential trace minerals and Vitamin B12 in cattle to support health, fertility and performance." MultiBoost with B12 compliments Elanco's existing range of mineral and vitamin deficiency treatments, including Cobalife VB12, Cobalife VB12 Plus Selenium, Selovin LA and Copperplan 20 Capsules
Healthy material
Designing for Reliable WFI Performance Consistent WFI quality depends on more than generation technology alone
1 2 "Vegan diet, subnormal vitamin B-12 status and cardiovascular health"
So the practical takeaway is not oral is better or SC is better. It is: pick one route, follow the documented per-dose figure for the vial you have, and keep the route constant so that whatever you observe is not confounded by a mid-stream route change