Baseline first. Without a baseline the after picture is decoration.

How long before you can reasonably say something is or is not doing anything? A fortnight in on nicotine and it lines up.

Cold storage, light protection, date on the vial. Boring, removes half the variables.

Ten percent cuts, of the current dose not the original. That is the arithmetic that keeps it survivable.

Sterility is the part people wave through and it is the part that actually bites.