Since porcelain is a somewhat delicate material and veneers are bonded to existing teeth, there are a few types of foods and drinks that should be avoided such as: Hard foods such as raw fruits & vegetables, nuts, and hard candy. Sticky foods such as caramel, chewing gum or soft candy. Tough & chewy meats. Eating these kinds of foods puts your veneers at risk of chipping, cracking or becoming dislodged from your teeth.