ArticleNutrients2025
Macroelement Content (Na, K, Ca, and Mg) in Microwave Foods.
Article in Nutrients, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
BACKGROUND/
objectivesThe consumption of microwave ready meals has increased significantly in recent years due to a noticeable reduction in the available time to spend cooking. However, one of the issues about this type of diet is its nutrient intake. The main objective of this study was to determine the content of macroelements (Na, K, Ca, and Mg) in samples of animal origin (omelette, chicken curry, meatballs, shredded meat, and prawns), vegetable origin (vegetable garnish, round rice, pesto pasta, cream of vegetable soup, and chickpeas with spinach), and mixed origin (pizza, lasagna, seafood paella, cannelloni, and spaghetti Bolognese).
methodsThe macroelement content was determined by ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometry) in 288 samples of different microwave foods.
resultsLikewise, the possible difference in the content of macroelements after the microwave heating process was studied, and significant differences in the Ca content were observed in the three analyzed food groups, indicating that there may have been migration from the container to the food. The concentrations of Na and Ca in the tails of garlic prawns (9381 ± 3102 mg Na/kg fw and 845 ± 134 mg Ca/kg fw) stood out. The vegetable side dish stood out for its higher concentration of K (3424 ± 1319 mg/kg fw). Pizza registered the highest concentrations of the four macrolements within the group of foods of mixed origin. The study of the dietary intake indicated that the consumption of some animal-based products offered a contribution to the safe and adequate intake of Na of almost 50%, which could pose a risk of dietary overdose as Na is an element found in many foods.
conclusionsIt is recommended to moderate the consumption of some of the dishes analyzed mainly because of the risk of the high intake of Na.
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