Changes of Fatty Acid Composition of Human Milk during the First Month of Lactation: A Day-to-Day Approach in the First Week
| Autor: | István Burus, Szilárd Molnár, Tamás Marosvölgyi, Hajnalka Minda, M Szász, Tamás Decsi, Andrea Kovács, Simone Funke |
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| Rok vydání: | 2004 |
| Předmět: |
Adult
medicine.medical_specialty Chromatography Gas Linoleic acid Medicine (miscellaneous) Biology chemistry.chemical_compound Essential fatty acid Reference Values Fatty Acids Omega-6 Internal medicine Lactation Fatty Acids Omega-3 medicine Humans chemistry.chemical_classification Hungary Nutrition and Dietetics Fatty Acids Essential Milk Human Colostrum Fatty Acids Postpartum Period Eicosapentaenoic acid Endocrinology medicine.anatomical_structure chemistry Docosahexaenoic acid Female Arachidonic acid Postpartum period |
| Zdroj: | Annals of Nutrition and Metabolism. 48:202-209 |
| ISSN: | 1421-9697 0250-6807 |
| DOI: | 10.1159/000079821 |
| Popis: | Background: Fatty acid composition of human milk (HM) is known to change considerably during lactation. However, we were unable to find data on changes of fatty acid composition of HM during the very early phase of lactation, i.e. in the first week of life. Subjects and Methods: HM samples were obtained from 18 healthy lactating women every day during the first week and thereafter on the 14th and 28th days of lactation. Fatty acid composition of colostrum and mature HM samples was determined by high-resolution capillary gas-liquid chromatography. Results: Values of the n-6 essential fatty acid, linoleic acid, in HM did not change significantly during the first month of lactation, whereas values of the n-3 essential fatty acid, α-linolenic acid, showed significant increases during the first 2 weeks of lactation (1st day: 0.49 [0.12], % weight/weight, median [ranges from the 1st to the 3rd quartile], 14th day: 0.69 [0.31], p < 0.05). In contrast, values of the n-6 long-chain metabolites, eicosadienoic-, dihomo-γ-linolenic- and arachidonic acid, as well as the values of the n-3 long-chain metabolites, eicosatrienoic-, and eicosapentaenoic acid exhibited significant decreases during the entire period investigated. The principal n-3 long-chain metabolite, docosahexaenoic acid, showed a significant increase between the 3rd and 14th days, but a significant decrease between the 14th and 28th days (3rd day: 0.15 [0.13], 14th day: 0.28 [0.11], p < 0.05, 28th day: 0.19 [0.12], p < 0.01). There were statistically significant positive correlations between arachidonic and docosahexaenoic acid values on the 1st (r = 0.67, p < 0.01), 5th (r = 0.56, p < 0.05) and the 6th (r = 0.53, p < 0.05) days of lactation. Conclusion: Fatty acid composition of HM changes significantly even during the first week of lactation. The lack of positive correlation between essential fatty acids and their long-chain metabolites suggests that it is not only the availability of essential fatty acids that influences the fatty acid composition of human colostrum. |
| Databáze: | OpenAIRE |
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