As I recall there has been discussion of possible improved bioavailability and shelf live of DMT in the salt form as compared to FB when dissolved in e-juice.
I found
this patent application by Small Pharma for deuterated DMT FB dissolved in PG, VG and other solvents.
They found deuterated DMT FB more soluble (I'd guess the same would be true for the protio analogues) than the salt form.
Anyone care to comment on the pros and cons of FB vs Salt form DMT in e-juice?