Again, it's important to understand that diet only affects 10% of your serum cholesterol. That's why you hear of people that eat high cholesterol diets and still have low numbers. When you make changes to your diet you are only lowering the 10% that pertains to what you eat. The rest is dictated on how your body produces and eliminates LDL, that's why so many people need medical intervention.
Diet, medications, exercise
I just had my full cholesterol panel done which is optimal as always. I love my bacon, eggs, butter etc. Saturated fat raises the good HDL and anything that raises HDL lowers triglycerides. And high HDL and low triglycerdies means you have large fluffy LDL and not the nasty small and dense LDL. Excellent! I also do intermittent fasting leangains style (16 hour fast/8 hour eating window). Intermittent fasting lowers total cholesterol levels and also improves HDL, triglycerdies and LDL as well.
Do sardines and canned meats increase cholestrol?
You can really lower it with any of those things- medications or food. Your doctor will know best which measures need taken to get the best results. It can be difficult to bring it down with diet only- so you may need some medication to attack the issue head on, then you can work to improve the situation with your diet. As far as diet goes- vegetables, some fruits, stay away from sugars- look at the labels and watch for the cholesterol, sodium, and fats (especially trans fat and saturated fat) in the products you eat. Lots and lots of greens- chicken, and various types of fish are good go to food items. Best of luck!