(From Newswise). A recent study demonstrates that calorie restriction (CR) improves longevity in ways unrelated to accompanying weight loss. This is not unexpected, as CR causes gene expression changes, but some scientists have assumed beneficial effects stem only from weight loss. You will recall that excess weight is reliably linked to a greatly increased risk of just about every horrible age-related condition known to man. Extra weight means a shorter, less healthy life - it's as simple as that. This study means that groups like BioMarker will probably turn up more interesting CR science in the near future.