A composition for treating or preventing inflammatory-related conditions includes as an active principle a carrier which exhibits a plurality of a scavenger structure capable of mitigating the activity of a mediator of inflammatory-related conditions. The scavenger structure includes a nucleophilic center complying with the formula X1(—R″—)(—R′)mHn where: a) X1 is a single-bonded heteroatom selected amongst N, O and S and exhibits a free electron pair; b) m is 0 or 1 and n is 1 or 2; c) —R″— is a bivalent organic group providing attachment to the carrier via one of its free valences and to X1 at the other free valence; and d) R′— is a monovalent organic group attached to the X1 via its free valence. A method for treating or preventing inflammatory-related conditions in an individual suffering from such conditions includes: providing the composition; and contacting the mediator within or separate from the individual.