Celery has negative calories — it takes more energy to digest than the calories it contains.

Coffee does not dehydrate you — the diuretic effect is offset by the liquid in the coffee itself.

Quinoa is technically a seed, not a grain, and is one of the few plant sources of complete protein.

Spirulina, a blue-green algae, is one of the most nutrient-dense foods by weight — used by NASA as astronaut food.

The world's hottest chili pepper, Carolina Reaper, measures over 2 million Scoville heat units.

Blue food is extremely rare in nature — most blue-colored foods get their hue from added dye.

Ketchup was sold as medicine in the 1830s to treat liver disease and indigestion.

MSG (monosodium glutamate) is naturally found in tomatoes, aged cheese, and soy sauce — and has no proven link to adverse reactions in controlled studies.

Wild blueberries have roughly twice the antioxidant content of cultivated blueberries.