Dietary advice based on the food pyramid/MyPlate. Before the late '70s, cardiovascular disease, diabetes, obesity, and mental illnesses were all rare in the general population.
We need to be eating fewer carbohydrates, not basing our diets around them. We need to be getting most of our calories from fat, not demonising it.
Thankfully, we have people like Dr. Ken Berry, Dr. Chris Palmer, Dr. Anthony Chaffee, Dr. Georgia Ede, Dr. Shawn Baker, Dr. Paul Mason, Dr. Tony Hampton, Dr. Jason Fung, and others spreading this message.
Saturated fats are bad. Unsaturated fats are better for you most fats should come from mono and polyunsaturated fats. Carbs are quick energy broken down into sugars, but raw sugars are bad for blood sugar, and gut bacteria diversity. There needs to be a relative balance of protein, carbs, and fats. Blood sugar shouldn't go up and down in spikes. It should flow like slight rolling hills. Increase the diversity in diets for wide/diverse gut microbiome are super important not probiotic supplements but from actual food sources. Vitamins and minerals should be balanced in foods and drinks, almost all added sugars and salts should be cutout of consumption.