The difficult balance between dietary polyunsaturated fatty acids

The evidence emerging from developing countries indicates a wide variability in the fat composition of human milk. The linoleic:alpha linolenic acid ratios, suggested to be included within the range of 5:1 and 15[20]:1, tend to fluctuate, and could indicate the capability of humans to self-adapt according to different dietary and environmental conditions. Conclusion: When referring to optimal "standard" dietary intakes for infants, the complex interactions between genetics and environment should be considered in interpreting observations from different settings.