Cholesterol-lowering effects of oat β-glucan: a meta-analysis of randomized controlled trials - Anne Whitehead, Eleanor J Beck, Susan Tosh, et al. -
"Adding ≥3 g OBG/d to the diet reduces LDL and total cholesterol by 0.25 mmol/L and 0.30 mmol/L, respectively, without changing HDL cholesterol or triglycerides... Oat β-glucan (OBG)5, the main soluble fiber found in oats, is seen as the main active component responsible for their cholesterol-lowering effect."