Adderall is a mix of d- and l-amphetamine.
Vyvanse is d-amphetmine bound to lysine, turning it into a prodrug (which means your gut chemically cleaves off the lysine and, conveniently, you're left with d-amp sitting in your gut).
Vyvanse is d-amphetmine bound to lysine, turning it into a prodrug (which means your gut chemically cleaves off the lysine and, conveniently, you're left with d-amp sitting in your gut).