I have had two cholesterol tests within 6 weeks of another, by chance one was for an NHS research project and the other was a private MOT work pay for. NHS health check showed LDL bad cholestoerol at 3.48 and provate health check at 5.4. How can it jump so quickly 6 weeks apart, both were the same in terms of non fasting. one a bit high and one worringly high. The week before the MOT I did eat a lot of cakes due to stress at work, usually I am very good, think a bag of four bakery cookies one day and a few dougnuts over the week too.