The SSDL particles are the wishy-washy ones that just can't make up their mind. Their levels tend to be high in people who can't make up their minds either, who keep yo-yoing from low-carb to high-carb diets, depending on the Diet of the Week in the daily tabloids.

Hence the SSDL test tells the doctor how apt you will be to follow any prescribed regimen. You want your SSDL levels to be as low as possible. Normal levels are usually defined as being a little lower than whatever yours are that day.

DW or NW. The DW and NW are the doctor's and nurse's weights, respectively. This is one test that is really fun to get. You go to the office for an appointment and get weighed. The doctor tells you to lose weight.

So you ask for the DW test, weigh the doctor, and ask why the doctor hasn't lost weight since you last saw him or her. Then you ask for the NW test, weigh the nurse, and ask the same thing.

It's really fun to tell other people to lose weight. So make sure you get a DW and NW test next time you see your doctor. You'll love it.