For step-by-step technique, see the RxPepsDirect injection guide
In the UK, intramuscular (IM) administration is standard practice for hydroxocobalamin, though subcutaneous (SC) may be used if specifically advised by your healthcare provider and following appropriate training

B12 has many functions in our body, so unfortunately a deficiency will give rise to a wide variety of symptoms, like brain fog, memory problems, cognitive impairment, insomnia, headaches, especially migraine, behavioural changes, learning problems, nominal aphasia, mood swings, irritability, depression, anxiety, hallucinations, delusions, psychosis, peripheral paraesthesia (pins and needles), numbness, neuropathic pains, poor balance, reduced vibration sense or proprioception (joint position sense), tinnitus, ataxia, taste impairment, sometimes myelopathy, fatigue, anaemia (either with larger red blood cells, or with normal size of the red blood cells when there is also iron deficiency), other reduction in blood cells, abdominal complaints, malabsorption, failure to thrive, weight loss, diarrhoea, hyperpigmentation, glossitis, (aphthous) stomatitis, infertility, urinary tract infections, joint and muscle pain, muscle weakness, spasticity, seizures, cardiomyopathy, urinary and/or faecal incontinence, postural hypotension/dizziness, erectile dysfunction, to name a few

[6] Once you've given your body a few days to heal, try gently moving your shoulder through its whole range of motion
Glutathione Shots Glutathione is a powerful antioxidant that is naturally produced in the liver
In direct comparative contexts, research consistently shows that the two mechanisms are genuinely additive rather than redundant supporting the scientific rationale for combining both in the BPC-157 TB-500 stack approach