preserve (someone or something) from (something)
To keep someone or something safe or protected from something. Many of these chemicals used to preserve our foods from decay have deleterious effects on our health. Parents are all so preoccupied with preserving their children from danger that they end up sheltering them from many of the things that make childhoods memorable.
preserve someone or something from someone or something
to protect or guard someone or something from someone or something. Please help preserve our people from the attacks of our enemies. Is there any way to preserve my skin against the harmful rays of the sun?