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Good sources of potassium include: potatoes, sweet potatoes, bananas, tomato sauce (without added salt or sugar), orange juice, tuna (fresh, frozen or tinned, but avoid tuna packed in brine), yoghurt and fat-free milk.ow to eat more potassium to lower blood pressure. Fruit and vegetables are full of vitamins, minerals and fibre to keep your body in good condition. They a great source of potassium, which helps to balance out the negative effects of salt and lower your blood pressure.
How To Increase Cortisol Levels Naturally. 1  Taking a diet to increase cortisol levels naturally such as eating food that are high in sugar and starch such as bread, pasta, and sweets. This will surely increase your cortisol level naturally. 2  Another way to increase the production of cortisol is by getting the right amount of sleep.