"Unfortunately, even the strict very low saturated fat, lowcholesterol American Heart Association Step 2 diet only minimally lowers serum cholesterol. Hunningha

"Unfortunately, even the strict very low saturated fat, lowcholesterol American Heart Association Step 2 diet only minimally lowers serum cholesterol. Hunninghake et al found a mean 5% reduction in low-density lipoprotein (LDL) cholesterol in patients following this program and discouragingly found an equivalent 6% fall in high-density lipoprotein (HDL) cholesterol, so that ratios were unchanged. Low-fat diets as commonly prescribed rarely produce significant LDL declines. Studies performed on controlled metabolic units where intakes are rigidly enforced can demonstrate cholesterol reductions of 15% with diet alone; however, in the real world, people can rarely replicate these results." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1312230/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1312230/