Journal
FOODS
Volume 10, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/foods10122938
Keywords
starter culture; ripening time; in vitro; infogest 2; 0; bioavailability
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Vitamin K is a fat-soluble group of vitamers, including phylloquinone and menaquinones, with different cheese products showing significant variations in both content and bioaccessibility of vitamin K vitamers. Factors like ripening time, starter culture, fat content, and water content do not fully explain these differences.
Vitamin K is a fat-soluble group of vitamers consisting of phylloquinone (PK) and menaquinones (MKs). To date, only a daily reference intake for PK is set; however, in the last decade, research studying the correlation between MKs intake and improvement of health in regards to cardiovascular diseases, bone metabolism, and chronic kidney disease has been conducted. MKs are synthesised by bacteria in the fermentation process of foods, e.g., cheeses. The content and bioaccessibility of vitamin K vitamers (PK, MK-4, MK-5, MK-6, MK-7, MK-8, MK-9, and MK-10) were assessed in eight different cheese products differing in ripening time, starter culture, fat content, and water content. The bioaccessibility was assessed using the static in vitro digestion model INFOGEST 2.0. Variation of the vitamin K content (<0.5 mu g/100 g-32 mu g/100 g) and of the vitamin K bioaccessibility (6.4-80%) was observed. A longer ripening time did not necessarily result in an increase of MKs. These results indicate that the vitamin K content and bioaccessibility differs significantly between different cheese products, and the ripening time, starter culture, fat content, and water content cannot explain this difference.
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