Niacin can increase GOOD CHOLESTEROL & LOWERS BAD CHOLESTEROL 🫀 Someone that has trouble lowering their cholesterol despite diet changes and medications may see benefit from adding in a niacin supplement. In summary: Niacin inhibits liver triglyceride synthesis. By inhibiting liver triglyceride synthesis this increases ApoB breakdown, decreasing VLDL and LDL (bad cholesterol) particles. Can lower triglycerides by 25% Niacin inhibits the breakdown of HDL ApoA, therefore increasing the lifespan o