Add the salt pork, onion and cayenne; bring to a boil. Reduce to simmer, and cook uncovered for 1-1/2 to 2 hours, or until thickened and creamy. Do not allow to boil. Stir in the bacon fat or butter, taste and season as needed with salt, pepper and Cajun seasoning.
Ferritin is a protein inside cells that stores iron so your body can use it later. It is sometimes used to determine the origin of certain anemic syndromes. You can increase your level of ferritin by consuming folate as a dietary complement or in foods like liver, avocado, orange juice, spinach, etc. Still you should wait till you see your doctor, so they can run more tests and be certain of why it is that you have a low ferritin level.
Fermented Foods. While fermented foods may not be a regular part of your diet, they can help increase your iron absorption. These foods include some types of soy sauce, sauerkraut, miso, kimchi and pickled vegetables like beets, cucumbers, capers, olives, artichokes, mushrooms and radishes.