Titebond II is food safe once cured

Water intrusion is the bane of any glue up. The expansion is stronger
than most any mechanical or adhesive conection can bear. Leave you
dining room table out in the rain and see what happens.

You need to keep it oiled with mineral oil. If you can't find it at a
culinary shop then the pharmacy should have it, it's a wonderful stool
softner and isn't bad over ice cream ;^)

You can disenfect your cutting board with a warm water and vinegar
mixture.