The high-fat meals (42% of energy from fat) caused, in contrast to the low-fat meals (6% of energy from fat), considerable increases in plasma triglycerides. The five different fat qualities - rapeseed oil, olive oil, sunflower oil, palm oil, or butter - caused similar postprandial increases in plasma triglycerides. These findings indicate that high-fat meals may be prothrombotic, irrespective of their fatty acid composition.