UPDATE: This article is a short resource for categories of food which are compatible with human health and physiology (or not). More specific dietary information for specific conditions and a proper human diet are in my new book Fuck Portion Control.
After every meal when growing up my father drank Pepto Bismol like it was a beverage. Because of his example I thought being an adult meant suffering from food. It's not true, and you needn't suffer. In fact, digestive stress is the very, very first sign of age related disease and leads to all other degenerative diseases like eczema, hair loss, diabetes, alzheimer's, parkinson's, etc.
Food often takes more than 24 hours to pass through your digestive system. One of the reasons I suffered from my wheat allergy for so long was that the reaction never happened until the wheat hit my lower intestine. By then I had already eaten one or two other meals, and mistook other foods for the cause of my discomfort.
Digestive stress means you've eaten something your body can't easily digest, but really that means you've eaten something which is causing metabolic damage. Easily digestible foods support youth and energy, difficult foods tear down youth and zap energy, without exception. Meals and meal plans should be based around fruits and vegetables and whole foods. Cutting out natural plants and food sources in preference for processed supplements will only lead to a worsening of problems. Supplements are supposed to be just that—supplemental, not in replacement of real food.
Here is a brief list of foods that support a robust and youthful metabolism, foods that destroy a robust and youthful metabolism, and toxic additives to avoid. Some foods like dairy can seem to cause problems, but are usually related to other digestive issues and not directly responsible for the trouble. If you thought that trusted brands like Trader Joe's, Bristol Farms, and Whole Foods are exempt from toxic, disreputable additives you would be wrong. Trader Joe's "Premium" ice cream is not really ice cream. It's milk and sugar thickened with carrageenan, a highly-allergenic extract from seaweed. When ingested carrageenan causes severe stomach distress. If you are looking to heal yourself, you must develop the habit of reading the labels on food, and choose true whole food choices, like unprepared fruits and meats, and do your own cooking.
GOOD FOODS TO EAT PLENTIFULLY
Fruit and Real Fruit Juices
Vegetables, especially vegetable fruits like Squash
Ice Cream, without additives
Grass Fed Tallow
Carbonated Beverages (without additives)
Various Protein suplements, without additives
Chocolate, without soy lecithin (see toxins below and read labels!)
GOOD FOODS TO EAT LESS OFTEN
Other vegetables, cooked (cruciferous plants are high in goitrogens and will give you thyroid disease if eaten raw or in excess)
FOODS YOU PROBABLY SHOULDN'T EAT BUT IT'S THE WEEKEND AND YOU WANT TO HAVE FUN
Avocados (wrong kind of fat)
Peeled Potatoes, Tomatoes and Peppers (nightshades)
Mexican food—not fried
Peanut Butter (it's a legume, and terrible fat)
Cruciferous Vegetables Cooked
FOODS AND SHIT THAT GAVE YOU THE CANCER FROM WHICH YOU DIE 15 YEARS FROM NOW
Yogurt (bacterial byproducts)
Fermented foods (bacterial byproducts)
Fish Oil and Fish Meat
Soy Lecithin (even Whole Foods puts this in chocolate—READ LABELS)
Raw Cruciferous Vegetables
Veganism & Fruitarianism (e.g. Steve Jobs)
Mexican food fried (it's fried in bad oils)
Carrageenan (at Whole Foods too—READ LABELS)
Guar Gum (basically all gum additives)
Michael Pollan, the celebrated food writer loves to say "Eat Food. Not Too Much. Mostly Plants." If my views were ever contained in one quote it would be, "Eat Whole Food. As much as you need. Appropriate for a Primate." And this is the measure by which I choose my food.