Insert the nozzle into the open nostril about half an inch or as far as it feels comfortable and tilt your head slightly forward (see Figure B)
Biomarker analyses reveal systematic endocrine disruption, characterized by 28.5% testosterone suppression and 45.2% FSH elevation in exposed populations, indicating primary testicular dysfunction rather than hypothalamic-pituitary axis impairment
Citations Andrs E et al, "The pathophysiology of elevated vitamin B12 in clinical practice." QJM, June 2013
Available from: Baleva M, Lesichkova S, Gesheva N, Mihailova S, Gerova V, Vladimirov B, et al
Summary: B12 deficiency can make HbA1c results unreliable by disrupting red blood cell production and turnover, potentially distorting results in either direction
For these injections, the body is better able to absorb smaller doses of B12 over time