Wooden Cutting Boards Have Been Proven Better for Your Health
It has been shown that high-quality cutting boards made of hardwoods, which have tight grain structure and small pores, are superior to other materials, including plastic. In a 1994 study, disease bacteria loaded onto pristine wooden surfaces were not recoverable from the surface a short time later, nor could bacteria be recovered from used wooden boards with many knife cuts. In contrast, bacteria loaded on to new plastic surfaces persisted, and they thrived on used, knife-scarred plastic. (Ak, N. O., D. O. Cliver, and C. W. Kaspar, 1994).
Still, It's Important to Properly Care for Your Wood Cutting Board!
Any cutting board used to prepare raw meat then other uncooked food, if not properly cleaned in between, can lead to the spread of disease-causing bacteria. You should always wash a cutting board with soap and water after using it to chop fresh meat. A very dilute solution of bleach and water is best for disinfecting wooden cutting boards.
By the Way, Wood Boards Are Also Easier on Knives
Knife blades dull more quickly when used on cutting boards made of unforgiving surfaces such as plastic. If it's important to you to keep your cutting board looking newer longer, as well as your knives, you should seriously consider end-grain-style butcher block. In the case of an end-grain cutting board, the cut ends of wood pieces form the surface of the board. The exposed wood fibers of these cut ends better absorb knife blades, so they are less likely to dull knives or to show scarring themselves.