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
That is exceptionally cost-effective and one of the reasons 2mL reconstitution is recommended for beginners
Meto's Perspective: Why Baseline Matters Before Any Peptide Protocol The clinical potential of GH peptides is real
Pre-treatment: Measure morning resting heart rate for 5 days Calculate average baseline Record any existing caffeine or stimulant use During treatment: Measure resting heart rate 3 times weekly during dose escalation Continue at each dose for minimum 4 weeks before increasing If resting HR exceeds baseline by more than 15 BPM, hold dose for an additional 2 weeks If resting HR exceeds 100 BPM at rest on two or more measurements, consult physician Expected timeline: Weeks 1-8: minimal heart rate change at starting doses Weeks 8-24: gradual increase of 5-10 BPM at therapeutic doses Weeks 24+: stabilization and gradual decline toward baseline This is the approach most researchers follow successfully, and it aligns with the standard retatrutide dosing protocol used in clinical trials
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