Liposomal formulations are lightweight and can be engineered to be non-migrating, making them safe for the eye area
David Kroll, a professor of pharmacology at the University of Colorado who has worked on antibody testing, explained that the antibodies mean "your immune system [has] remembered the virus to the point that it makes these antibodies that could inactivate any future viral infections." What the test can't do is tell you whether you're currently sick with coronavirus, whether you're contagious, whether you're fully immune and whether you're safe to go back out in public
It is naturally occurring and active at tiny concentrations
727 The -glutamyl cycle A
Hu W, Song R, Cheng R, Liu C, Guo R, Tang W, et al
Documented research protocols reference a figure of about 0.25 mg per administration