The clinically approved dosage is 1.4 mg administered once daily
For a 5mg vial, adding 2ml of bacteriostatic water creates a concentration of 2.5mg/ml (2500mcg/ml)
However, 11% of girls 14e18 years had intakes less than their EAR of 2.0 mcg
Most users tolerate it well
The NHS symptoms list groups them into general anaemia symptoms (tiredness, breathlessness, headaches, loss of appetite, weight loss) and neurological signs (peripheral neuropathy, balance problems, depression, memory and concentration changes, sometimes mood changes or psychosis in advanced cases)
Only people who were deficient see a metabolic lift