when will i feel the effects of vitamin b12 injections Injections: What You Need To Know Feeling worse after B12 Injection:

The researchers found that PRP significantly downregulated the expression of inflammatory cytokines and matrix metalloproteinases (such as MMP3 and MMP13), which are responsible for breaking down joint tissues

Fenton N, Neil M

The main manifestations of biotin deficiency are epilepsy, psychomotor retardation, deafness, abnormal muscle tone, skin manifestations, and decreased vision, which usually occur in the first few months of life

If you do the math on absorption rates, this leaves you with 0,12 mcg of vitamin B12, much below the bodys requirements as far as what the general population requires, let alone what a bariatric patient requires