Global sales of air fryers have surged by double digits over the past year, a shift now accompanied by a wave of practical guidance from culinary and health professionals on how to store and prepare everyday foods to preserve quality and nutrients. The immediate effect is measurable: households adopting these methods report shorter cooking times, lower energy consumption, and better retention of heat-sensitive vitamins, as demonstrated by the rapid, high-heat air-frying of potatoes that yields a crisp skin and tender interior without the nutrient loss associated with boiling.

The advice extends well beyond cooking technique. In Spain and Latin America, chefs have issued clear warnings on potato storage, noting that exposure to light and humidity triggers the production of solanine, a glycoalkaloid toxin that can cause gastrointestinal and neurological symptoms at high concentrations. The visible sign is a greenish tint on the skin; if intense, the tuber should be discarded. Storing potatoes in a cool, dark, dry, and ventilated space—and crucially, separating them from ethylene-emitting onions while keeping them near garlic, whose allicin inhibits sprouting—can significantly extend shelf life and reduce the risk of toxin formation.

Parallel guidance from nutritionists in Mexico, Italy, and the Middle East underscores the nutritional density of seasonal produce when handled correctly. Mangoes and papayas, widely consumed in Latin America and Asia, deliver high levels of vitamins A and C, along with fibre and digestive enzymes like papain; strawberries, a summer staple in Europe and the Levant, provide anthocyanins and vitamin C with a low glycaemic load. Italian experts note that asparagus, composed of over 90% water, offers diuretic and prebiotic benefits, but its water-soluble vitamins are best preserved through steaming or rapid pan-frying rather than prolonged boiling. Across all regions, the message is consistent: preparation method directly influences nutrient availability.

The convergence of these recommendations reflects a broader, evidence-based refinement of domestic food handling. As air-fryer penetration deepens—particularly in European and Latin American markets—appliance manufacturers and public health agencies are expected to integrate such cooking and storage advice into consumer guidance. The next factual milestone will be the publication of updated national dietary guidelines in several countries, which may for the first time incorporate evidence on cooking methods and storage practices to maximise nutritional outcomes.