Notify the Admin When a User Updates Their Profile

function user_profile_update( $user_id ) {
    $user_info = get_userdata( $user_id );

    $to       = get_option( 'admin_email' );
    $subject  = 'User Profile Updated';
    $message  = "Hello Administrator,nnThe " . $user_info->user_nicename . " (" . $user_info->user_email . ") profile has been updated! nn";
    $message .= "Site URL: " . get_bloginfo( 'wpurl' ) . "nn";
    $message .= "Regards, n" . get_option( 'blogname' );

    wp_mail( $to, $subject, $message );
}

add_action( 'profile_update', 'user_profile_update', 10, 2 );