Answer by gNU.be for cron ignores variables defined in ".bashrc" and ".bash_profile"

You can source the file you want at the top of the script or beginning of the job for the user that is executing the job. The "source" command is a built-in. You'd do the same thing if you made edits to those files to load the changes.

* * * * * source /home/user/.bash_profile; <command>

or

#!/bin/bash
source /home/user/.bash_profile

<commands>