This thesis describes the problem of today's diets and presents a potential solution -superfoods. The aim is to check whether superfoods are really that highly nutritious. The importance of minerals for our bodies and health and the mechanism of mineral bioavailability are described in more detail. In the first part of the experiment, ten different superfoods from two different manufacturers are analysed with an XRF spectrometer and then the three superfoods with the highest mineral content are selected for the next part of the experiment. Based on the results of the elemental concentrations, we compare whether the superfood meets the recommended daily intake of minerals. We find that not all selected superfoods are as highly nutritious as advertised by their manufacturers. In the second part, we perform a bioavailability test to check how much of the minerals are available for absorption into the slug's body, which is done by feeding the slug gradually over a period of ten days, followed by sacrificing the slug and dissecting it. Based on the calculation of the concentration of elements in the hepatopancreas and muscle, the content and the normalised content, we determine the superfood that has the most available elements.
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