I had been reading back2me's entry about the whole green M&M myth and figured I'd give it a try. All I can say is that her childhood lied to me. Even after popping a quarter of the bag or so, I still had no more inclination to go plow a cheerleading squad than usual. I'm pretty sure that the makers of Viagra have nothing to worry about.
While on the topic of scarfing M&M's, I ran across an interesting study a few days ago.
To answer these questions, the new study, published in the American Journal of Clinical Nutrition, examined 5,000 pairs of British twins aged 8 to 11. By comparing similarities of outcome between identical twins (who share all their genes) and fraternal twins (who share half), the authors calculate that BMI in the sample was 77 percent heritable. That is, 77 percent of the variation between thinner and fatter kids could be attributed to genetic differences. Of the remainder, "shared environment" (growing up in the same household) accounted for 10 percent, and "non-shared environment" (for example, being the eldest kid instead of the youngest) accounted for 13 percent.
So there you go for anyone who needs to explain away some of that Valentine's day candy. We're all fat because of our porky genes.