A test for triglycerides is used to check for the presence of this type of lipid (fat) in the blood. This examination aids in determining the likelihood of heart and brain blockages occurring. Triglyceride levels that are elevated could signify severe renal, brain, or heart disorders. Triglyceride levels are more likely to be increased in persons who have sedentary lifestyles, consume unhealthy foods, or are obese. To proactively lower the risk of stroke or other serious cardiovascular disorders, an accurate diagnosis of the triglyceride level must be made.