There's no official definition — here's what the label usually means, and what actually matters more.
"Superfood" is a marketing term, not a scientific or regulatory category — there's no official definition, no nutritional threshold a food needs to cross, and no body that certifies one food as "super" and another as merely ordinary.
Foods marketed as superfoods — blueberries, kale, chia, goji berries, spirulina — are often genuinely nutrient-dense, which is a real, meaningful property. The issue is the implication that they work differently or more powerfully than other nutrient-dense foods that don't carry the marketing label.
Research consistently points to variety and overall dietary pattern, not any single exceptional food, as what actually moves the needle on inflammation and health. A rotating variety of ordinary vegetables, legumes and fruit does more than any one "superfood" eaten in isolation.
Our honest take: buy the blueberries if you like them — they're a genuinely good food. Just don't expect them to outperform a boring, varied vegetable habit, and don't feel like you're missing out if you skip whatever's trending this year.