Biomarker Context and Dosing Response Variability Dosing efficacy varies significantly across individuals due to differences in metabolic rate, insulin sensitivity, glucagon-like peptide-1 receptor expression, and gastrointestinal motility
Tesamorelin stimulates the release of growth hormone from the pituitary gland, while Ipamorelin increases GH production by mimicking the natural release patterns of the hormone
This just scratches the surface of the serious public health issue
Bull Exp Biol Med 161(1):175178
Always good to have a reason I have also had this happen when my folate was low , it may be worth you getting it checked I had self inject my B12 every 4 weeks for the last 20+ (cannot really remember how long accurately), and 2 months ago got a similar 'electric shock tingling' all over my body - head, face, arms, hands, legs, feet etc within a couple of minutes of injecting, which lasted about 3 seconds or so