There is no single correct amount
In other words, two studies can list the same dose and still test meaningfully different conditions
The exact shelf life depends on the peptide, solvent, sterility, concentration, light exposure, and handling
Counteraction of GLP-1 effect on gastric emptying by co-infusion with prokinetic drug erythromycin during a liquid test meal diminished GLP-1s ability to decrease postprandial hyperglycemia in patients with T2DM (153)
At that point, you can test every 4 hours for more accuracy
This method delivers more focused glutamate and can produce results in a shorter time, but one must seek the advice of a professional aesthetician in this case before trying this out