To further enhance your experience, consider incorporating relaxation techniques before the injection
The four below sit closest to it in research community use
There is the ophthalmic vein, angularis vein, facial anterior and posterior vein, and facial vein, or through cerebri superior veins, sinus cavernosus, sinus petrosus superior and inferior, sinus transversus, through the jugular external vein, subclavia vein through the superior caval vein, retrograde filling of both jugular external veins and both superior caval veins with vertebral veins
So far, Asprey says hes spent at least a million dollars hacking his own biology, and making it to 2153 will certainly take several million more