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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

Now were all on the same team, Siraj says

Elevated Mood: B12+ injections promote serotonin production for a natural, balanced lift in mood

Lau highlights the Golden Trio of Scalp Health strengthening the scalp, stabilizing the roots, and activating the follicles

For instance, treating both tennis elbow and trigger finger in the same patient requires this modifier on the second procedure to avoid bundling denials

And critically, it acts on the hypothalamus to reduce appetite, creating powerful satiety signals that make people eat significantly less without feeling deprived