If there's one dietary change with the highest leverage for metabolic health, it's this one.
Processed seed and vegetable oils, including sunflower, canola, corn, soybean, safflower, and grapeseed, are loaded with linoleic acid, an omega-6 fatty acid that, in excess, is profoundly disruptive to metabolic function.
When consumed in the quantities found in a modern Western diet, excess linoleic acid drives fat cell expansion, promotes insulin resistance, and triggers systemic inflammation, all of which contribute directly to elevated blood pressure.
Replace seed oils with traditional cooking fats: butter, ghee, tallow, coconut oil, or extra virgin olive oil. When eating out, ask for food to be cooked in butter. When buying packaged food, read the label, if a seed oil appears in the ingredients, put it back.