How to express this idea?

One of my friends ask me to polish his draft of self-introduction. One of the sentences reads like this:

the reason I choose to explore life science can cast back to my childhood.

The idea he wants to express is that his childhood exerts much influence on why he want to explore life science now.

I feel that his sentence sounds a bit awkward, but I fail to come up with a better sentence.

Who can help me to make a better sentence without changing his sentence patterns too much. Thank you a million!