I know about epigenetics. As part of my day job I taught one of the world leaders in the field (Professor Emma Whitelaw) how to do proper statistical analyses of her epigenetic data. Emma is an outstanding molecular geneticist but I was able to help her out with numerical analysis.

Thanks for drawing my attention to Andrew Weil.

From a look at his Wiki page (Andrew Weil - Wikipedia, the free encyclopedia) he seems to be fairly sensible though I note that a number of his claims have been challenged by evidence-based health professionals, on the grounds that there are no empirical data which support them.