The surefire way of doing that is by injecting into the muscle. 2
Neurological Symptoms Several Weeks to Months If you have tingling, numbness in your hands or feet, or balance problems caused by B12 deficiency, these symptoms take longer to improve
doi: 10.3390/biomedicines10123221
The deltoid cannot be used if that area is very thin or underused
They can support mechanistic hypotheses about endothelial response and microvascular repair, but they do not establish human wound healing efficacy, cardiovascular benefit, clinical safety, or suitability for any condition where abnormal angiogenesis could be biologically relevant
By delivering nutrients directly into the body, these treatments provide faster absorption and moreeffective results than oral supplements