Most products labeled "Butcher Block Oil" are nothing
more than mineral oil. You can buy mineral oil in most drug stores. They are totally safe is swallowed.
You didn't say what brand of "conditioner" you have. Most conditioners are a thinned varnish and mineral spirits. While they won't kill you, they can impart strange flavors to foods. They are not intended for use on food prep surfaces. They are intended to even out stain coloring on difficult to stain woods.