There is no universal list of the world's healthiest foods. The Inuits of Greenland have lived on high-fat and high-protein foods for decades. The Massai of Kenya have lived on animal blood and animal products. The Trobriand Islanders live on saturated fats. The only thing all of these people have in common is that they have thrived physically and avoided heart disease, strokes, diabetes and cancer. All of their diets are different but they are all based on whole foods.
Berries
It doesn't matter what kind of berries they are, but if they grow on a vine, they probably are good for you. Berries are low in calories, high in fiber, they improve memory and help fight cancer. Blueberries are packed with nutrients called anthocyanins, which can neutralize cataracts, glaucoma, hemorrhoids, ulcers and cancer. They can also support the vascular system.
Wild Salmon
Wild salmon has a very high omega-3 content, and it consistently ranks higher than farm-raised salmon. Omega-3s protect the brain, the heart, and it helps lower blood pressure. It can also improve mood. It is high in protein and a powerful antioxidant.
Brassica Genus
This is a fancy way of saying "green, leafy vegetable." This includes broccoli, cabbage and kale. This is nature's top cancer fighter. These vegetables are loaded with indoles, which have an excellent chance of slowing cancer.
Apples
It's one of the earliest medical catch phrases that we are taught. "An apple a day keeps the doctor away." It's basically true. Apples are loaded with fiber, minerals, anti-inflammatories and antimicrobials that can lower the risk of heart disease.
