Focusing on one food is not the best way to lower cholesterol. Also, too many beets can have negative effects on kidney function. It's best to pursue a balanced diet. Here are some ideas for foods that help lower bad cholesterol: https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/cholesterol/art-20045192
If you have been diagnosed with high LDL cholesterol, make sure to keep consulting your doctor and having your cholesterol checked.