Vyvanse's slow-release mechanism, dependent on red blood cells cleaving lysine, leads to smoother, more evenly distributed entry into the body.

“so although they designed it to be a anti-drug abuse drug it actually turns out to be one of the sort of most consistently evenly entering the body for some people it goes in so slowly that they say I don't feel it”

“and also towards the end of the day one of the the best in terms of not falling off abruptly um the potential downside is again that the capacity of the red blood cells is limited so at some point for most people because that's a rate limiting step when you're adding more and more you're actually extending the duration of time more than you're getting a bigger Peak because your your red blood cells just aren't cleaving it fast enough to make more Dexter amphetamine available”