I started taking 1000 mg of niacinamide, which is vitamin B3, to help me get to sleep. When I went in for my annual check up with the doctor, my cholesterol actually went too low and she told me to lower my dose to raise my cholesterol. It took about 6 months of taking it. Also, niacinamide doesn't make you flush like niacin, and it still worked to lower cholesterol. The only side effect is it makes you really sleepy, so take it before bed.