Fatty acid composition of mature breast milk in Brazilian women

This work analyzed the fatty acid composition of mature milk samples, weekly obtained from eight Brazilian women between the 4th and 13th lactation weeks. A questionnaire was weekly applied to observe their eating habits. Saturated fatty acids constituted 39.7% of the total fatty acids. De novo fatty acids and long chain saturated fatty acids presented levels of 15.9% and 23.8%, respectively. trans-Fatty acid content was very low (2.36%). Unsaturated fatty acids constituted 50.9% of the total fatty acids, with over half being monounsaturated fatty acids (27.6%). Polyunsaturated fatty acids showed levels of 23.3%, with high linoleic and α-linolenic acid contents (20.3% and 1.43%, respectively). Arachidonic acid had a content of 0.53%, while docosahexaenoic acid content was 0.14%, values considered adequate for the needs of breast-fed infants.