Why do people put on differing amounts of weight?
This is pretty astonishing research, not so much for the results, as for the methodology.Doing research on what people eat is VERY hard, it's very hard to get accurate data.Pairing people and having them eat identically is brilliant. I hope it's also scalable for longer term studies.By pairing people they are likely to give much more accurate reports about what they actually eat, and it allows direct comparisons.