Food containing red meat, dairy products (butter, oil, cream), organ meat, and high sugar can increase triglycerides. Persisting high
levels can be dangerous. However with most people a diet
control helps. Presence of diabetes
and hypothyroidism too can cause a high triglyceride level and hence should be eliminated. Please consult your doctor regarding this. If diet control and exercise does not help, then there are drugs which can be taken to lower these.
Hope this helps.