 [ Symptoms ] i have been getting ectopics whenever i do anything that raises my heart level need your advice [ Disease ] it is possible that what you ate the night before your blood test could influence your test somewhat probably not significantly if you think this is the case you can repeat your test eating like you normally would but another factor is your blood sugar control if you blood sugars have been higher lately that could also cause your cholesterol to increase you can tell this by checking your hemoglobin a1c a registered dietitian can help sort this all out you find one in your area at eatright org or going through your doctor see also foods that help lower cholesterol good luck