We do not treat the wood with anything.  All of our wood is kiln dried to be sure the moisture content is consistent for building with and being sure there are no creepy crawlies in the wood.  For our finished products, depending on what the item is, we use furniture sealers that are little to zero VOC’s, so you can be sure that you and your loved ones will be safe.  For our tables, we use a Rubio Monocoat which is a plant based zero VOC product.  Because of this, be sure not to ever use harmful cleaners to clean your products.  We have a list of recommended products as well as selling a safe Rubio wood cleaner which is available online.