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Refrigerate Natural Peanut Butter?

I just bought some natural PB(the only ingredient is peanuts).
On the container it does not mention to keep refrigerated.
Should i?
Thanks.

EDIT Please delete, i found the answer to refrigerate after opening.
Thanks

I’ve read that mold can grow on the peanut butter if left at room temp.

Yeah I found out the hard way. A couple months won’t be any issue in the cupboard but I think mine stayed for 6+ months. Bathroom runs were frequent.