Xylichew uses birch and beech resin and has a gum base free of plastic.
To ensure I get an effective amount of xylitol, I use crystals in my tea and coffee. My child eats them with a spoon. Health Garden is one of the brands that uses birch xylitol.
Health concerns for humans is potential digestive issues at high amounts (many tends of grams). Health concerns for canines is prolonged excruciating death due to live failure in rather small amounts. Don't let your dogs near xylitol.
To ensure I get an effective amount of xylitol, I use crystals in my tea and coffee. My child eats them with a spoon. Health Garden is one of the brands that uses birch xylitol.