They must be worn or ground down continuously by gnawing. Digestion involves mechanical and chemical activities. Sloths have no incisors at all, and sheep have no incisors in the upper jaw see diagram The specialization of teeth was a significant aspect of mammalian evolution. Origins and early evolution of herbivory in tetrapods.
Food Form and Function
The absolute most important thing to look for in a Garcinia Cambogia supplement is the purity of the pill. The higher the HCA(hydroxycitric acid) concentration, the more mileage you are going to get out of the supplement. All brands will contain some amount of the extract from the actual fruit, but the amount of the active substance can vary a lot. There are plenty of fly-by-night products around(pretty much all of the ones in local stores) that only offer a very subpar purity.