If you get five nutrition experts in a room, you'll probably have six different opinions on how to eat right. So sources are always available for anyone's view.
I've spent a lot of time looking at studies and articles on eating patterns, and have experimented myself with several ways of eating for years at a time. Generally, the more convincing arguments I've seen come from the camp that that says fears of saturated fat and cholesterol are overblown, as the OP states, and in my experience this is true.
Cholesterol
-Dietary cholesterol is usually a smaller source of body cholesterol than what the body makes itself. Like most of what the body does, it tends to do a good job of balancing cholesterol when there isn't some harsh stimulus disrupting it. When you eat more cholesterol, the body makes less cholesterol, and when you eat less cholesterol,
the body makes more cholesterol. Populations that avoid processed foods but that eat a lot of cholesterol and saturated fat
don't really have cholesterol, fat, or heart problems.
-Cholesterol is correlated with heart disease but not necessarily causal. But as previously described, the body generally balances cholesterol well anyway. From what I've read, cholesterol apparently coats artery walls when there is inflammation, which if that's the case, means that the inflammation is what to look at first. No inflammation: no coating of cholesterol. In that model, cholesterol is being used by the body to fix the problem but getting the blame for the problem because it builds up in excess. Like blaming a cut on a band-aid because band-aids are often found where cuts are found.
Saturated Fat
-The traditional diets of Inuit people consists of like 99% animal parts. Tons of very high-fat animals, including foods where they literally eat big chunks of saturated animal fat.
Here's an article on it. Heart disease and diabetes rates for them are much lower than in the United States and other countries, although they're increasing because they're eating more processed foods and less of their traditional diet. The combination of an active lifestyle and a high-fat high-cholesterol diet was/is very protective on their cardiovascular system.
-The "
French Paradox" is named such because of the apparent contradiction that French people statistically consume a lot of saturated fat but have some of the lowest rates of heart disease and obesity in the developed world.
Inflammation
-Foods that cause chronic low-level inflammation (
bad for health) are things like unhealthy processed oils ("vegetable" oil, sunflower oil, safflower oil, etc), corn products (in basically everything processed), sugar, food high in omega 6 fatty acids, gluten in some people that are sensitive to it (and some argue for everyone else too, not sure about that), and other food products rather than food. Foods that are understood to reduce inflation are foods high in omega 3 fatty acids, foods that are high in vitamins and minerals (antioxidants), and various whole natural foods in general.
-Foods that are advertised as low fat and no cholesterol often have a lot of something else. Like more sugar, or more salt, and various processed things. If you eat low fat, it means you're eating more of something else, usually carbs.
My diet consists of nuts, gluten-free grain-like things (quinoa, buckwheat, amaranth) fruits, vegetables, some rice (for veggie stir fry), some sprouted beans (lentils, mung beans, etc), certain oils like coconut oil (high in saturated fat) and olive oil, and some whole grain pasta (sometimes wheat-based with gluten, sometimes rice-based with no gluten), tomato sauce, and extra dark chocolate (which includes saturated fat) and some red wine from time to time. It's mostly dairy-free, though during times when I've used milk, I always use whole milk or soy (non-dairy) milk. For a long time I was vegetarian and at one point I was vegan. For a while now I have added back in some wild caught fatty fish and Amish-raised chicken (including the fatty chicken skin) as a small part of the diet. Basically the main "rules" of my diet are that almost all the food must be whole foods with a simple number of recognizable ingredients rather than processed food products. Plus absolutely no factory farm animals. Other than that, it's balanced well between protein, carbs, and fat.
I don't make any attempt to limit fat in any way, at least not the fats I consider healthy, but I do strictly limit added sugar and all processed oils and empty carbs. Basically, the idea of sticking to mostly whole foods just keeps things balanced naturally- not a ton of carbs, fat, or protein in disproportion. My blood tests are always excellent according to the doctor, with a healthy high HDL cholesterol level, low LDL cholesterol level, low triglycerides, and the dozens of other metrics are all in the healthy range. I'm currently attempting to
gain weight and am finding it hard to do so- the diet is just naturally very filling.