@thehadezb. I would recommend eating organic cranberries and blackcurrant. Plus nuts such as walnuts. Cranberries have many benefits, super low ph, very low sugar, high in iodine (for thyroid), help against parasites and much more. Walnuts are the most acidic nuts that I know of. If you don´t break down your food constipation can occcur easily, especially if you eat foods that are acidic and alkaline together since that messes up stomach acid, which is an issue if you have weak one. Or if you don´t produce enough bile (to break down your fats), which acts as a lubricant.
Blackcurrant or Yellow Bell pepper have a high Vitamin C count. There are others which are even higher. Liver is good too. Vitamin C can increase intestinal motility and increases WBC, which kills pathogens and parasites that can cause constipation. It is super important for immunity. You can also try Vitamin C liposomal instead of eating carbs. Sometimes eating more fat is not the answer. You need to look at other factors too. I solved my year long constipation issues by adding acidic nuts, berries, stopped dairy due to estrogen which inhibits proper function of gallbladder (for bile) and now again, anti-parasitic foods such as onion, pumpkin oil and pumpkin, cayenne pepper, ACV, oregano oil, but also black tea helps. There are so many things against parasites. Basically going low carb/keto and anti parasitic foods was key, adding fats did not matter that much. And I eat cooked foods btw. I also drink lots of distilled water, helps a lot against constipation. Almost solved my year long health problems. Energy finally went up. But one thing I learned through these years, eliminating pathogens/parasites/candida or fungal overgrowth is the key for good health. Parasites are not necessarily a bad thing, since some of them consume waste matter, but there are the ones that can make your health go downhill fast and it´s hard to recover from them once they got out of hand and keep on reproducing.