By Philip Fine

A US study has found a correlation between rising rates of obesity and the introduction of widespread fructose use.

The Louisiana State University study noted that consumption of high-fructose corn-based sweeteners, used in most soft drinks, increased more than 1,000 percent between 1970 and 1990.

No other ingredient saw such a spike. It was during that period, the authors note, that many countries showed sudden increased rates of obesity. The authors call for more sweetener alternatives. The US National Soft Drink Association repudiated the study, arguing that people are heavier today because they are taking in more calories than they are working off.