While the causes of conditions such as heart disease and diabetes are many and varied, there is growing evidence that the process of inflammation is an important underlying factor.
Women who are underweight find it difficult to conceive, as do those who are overweight, but the latter are more likely to suffer from complications during pregnancy.
Since a compelling experiment was shown on the BBC's Child of Our Time last week, sales of Omega-3 supplements have rocketed. But, asks Ian Sample, are behavioural problems so easily solved?
Sick of Atkins? Don't worry, there's a new diet in town - which could have health benefits for us all. Lucy Atkins on the glycaemic index approach to eating.