MSM (Methylsulfonylmethane)

MSM is a sulfur-containing chemical found in some plants and animals.  It can also be created in a laboratory by combining sulfur with methane or petroleum byproducts with industrial-type waste.  

It helps form connective tissues such as cartilage, ligaments, and tendons and is an important component in joint health
It may reduce pain by slowing pain-transmitting nerve impulses.  
It may increase the cellular uptake of many minerals, nutrients, and vitamins.  
It may be useful in many conditions, illnesses, and diseases such as allergies, autoimmune diseases, cancer, cystitis, neurological disorders, etc.

Many people report seeing more improvement in their pets when combining joint supplements with MSM as opposed to using joint supplements alone.

Recommended dosages vary from source to source.  The most recommended seem to be:

• 250 mg. per each 10 lbs. body weight
  
• 500 mg. per each 30 lbs. body weight