I have soft, cracked, or brittle nails

I have dry, itchy, scaling, or flaking skin

I have hard earwax

I have chicken skin (tiny bumps on the backs of arms or on the trunk)

I have dandruff

I feel aching or stiffness in my joints

I am thirsty most of the time

I am constipated (have fewer than two bowel movements a day)

I have light-colored, hard, or foul-smelling stools

I have poor mood, difficulty paying attention, and/or memory loss

I have high blood pressure

I have fibrocystic breasts

I have premenstrual syndrome

I have a family history of high LDL cholesterol, low HDL levels, and high triglycerides

I am of North Atlantic genetic background: Irish, Scottish, Welsh, Scandinavian, or coastal Native American