Individual tests

Rheumatoid factors are proteins that sometimes mistakenly attack healthy cells and tissues in your body. Not everyone has rheumatoid factors in their blood. If you have high levels of rheumatoid factors, you may have rheumatoid arthritis. This disease can damage your joints and cause pain, swelling, and stiffness. It is a chronic (long-lasting) condition that can affect your organs and cause other symptoms.
Cholesterol is a substance found throughout the body. Your body needs some cholesterol to work properly, but too much will block your arteries and lead to heart disease and stroke.
Triglycerides are a common type of fat that comes from food and consuming extra calories. Your body changes these excess calories into triglycerides and stores them in fat cells. When your body needs energy, it releases triglycerides. Very-low-density lipoprotein (VLDL) cholesterol particles carry the triglycerides to your tissues. Having a high level of triglycerides can raise your risk of heart disease.
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