Another study used a genetic loss of function mouse model to delete the GLP-1R in vagal afferent/effect nerves ( Phox2b-Cre Glp1r flox/flox ) (Sisley et al., 2014)
By the time anything reaches the bloodstream, the original peptide structure is gone
The AREDS/AREDS2 trials show that a specific combination of vitamins C, E, zinc, copper, lutein, and zeaxanthin can slow the progression of intermediate-to-advanced AMD
Dosing depends on your age, baseline labs, training load, sleep architecture, body composition goals, and any underlying conditions that might change the calculation
Talk with the clinician who manages your meds so timing, risks, and lab follow-up are clear