A balanced diet based on unprocessed foods is the key, it always has been, these new “diets” have their fallbacks. They use a lot of questionable sweeteners to replace sugar. Your brain needs natural sugars, it’s not good to deny your brain.
Research is showing Paleo increases biomarkers connected to heart disease. Moderation in all things is the key in my opinion. I have lost lbs. just watching portions, and exercising. Drinking lots of water is also vital to health, a lot of disease is tied to dehydration and often people aren’t aware they are dehydrated, especially older people.