Very high triglycerides can be caused by poor diet and not enough exercise. You may also have inherited very high triglycerides from a parent. Your doctor will tell you how to manage your triglycerides. If your weight is higher than what is considered healthy, losing even 5 pounds may help lower your triglycerides.
WORD likes it un-hyphenated but I don't. Long-term should be hyphenated but longtime should not be hyphenated, at least until a few more decades pass and the grammatical rules for the use of hyphens either relax or fade away. Here is part of an erudite commentary on this subject:
Do hyphenate: 1  Full-time and part-time when used as adjectives (He is a full-time employee. But: He works full time.) 2  Modifying words combined with well when preceding a noun (a well-known author) 3  Words beginning with the prefixes all and self (all-encompassing, self-supporting)