Triglyceride levels change throughout the day. The concentration is the least at around 3 a.m. It rises till mid-afternoon and then starts to decrease. The levels rise after heavy meals.
Pregnancy can lead to changes in triglyceride levels. Sometimes, triglyceride levels are 10-20% higher if the blood sample is collected from a person who was standing than when the sample is collected from a person who was lying down. Drastic weight loss can also affect triglyceride levels.