Fiber consumption has long been known to reduce cholesterol levels in a dose-dependent fashion.
Current recommendations are to get 15+ grams of fiber per 1000 Calories, but we know from, e.g., hunter-gatherer populations that humans can eat far more than that.
Building a diet around whole food sources that are high in fiber and protein is basically all you need for a healthy diet, constrained by however many calories you need to support a healthy weight.
Fruits, veggies, legumes, whole grains, nuts, seeds, etc. should make up the majority of your diet.
For one, there could be some financial incentives mixed in in that health insurance companies would want their people to be healthier so they don't pay out as much, but it's not that simple for them either - the health industry as a whole profits more if there is more treatment ergo more health problems. If health care was cheap or less needed the insurers themselves would make less.
More importantly, there can be other than financial incentives mixed in for doctors and public health organizations to encourage health. Doctors for example take an oath and I think often genuinely want their people to be healthy. Public health organizations may be more murky but there's definitely a financial and otherwise incentive for the government itself minus those corrupted by the health industry, to want people to have less health problems.
The problem is entirely about patients refusing to do what they know is good for them if it takes any self-discipline, so doctors resort to medication.
Iv seen few tweets by hardcores going from 'lol its obviously fake and stupid ragebait' to 'yes yes this is totally rational' after learning letter was real.
Math Academy has a comparable Discrete Math course that shows you how to solve every problem after you submit a solution and incorporates spaced repetition.
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