Fats: the good, the bad and the essential
AHA caps saturated fat at <10% of kcal (ideally <7%) and trans fat at <1%. Replacing them with mono- and polyunsaturated fats lowers LDL.
Omega-3 (ALA 1.1–1.6 g/d, EPA+DHA 250–500 mg/d) is anti-inflammatory. Most Western diets are already very omega-6 heavy.
Keto diets push fat to 70%+ of kcal — focus on mono- and polyunsaturated sources, not just butter and bacon.