Methodological limitations question the breakfast/healthy weight link.
Numerous studies have found links between eating breakfast and maintaining a healthy weight or skipping it and becoming overweight. But association is not causation. A U.K. study found breakfast seems to be a proxy for other factors like conscientious healthy eating and vigorous exercise. A very large study concluded the breakfast consumption theory was not consistently associated with differences in BMI or overweight--and the authors are consultants to Kellogg's!
PositiveTip: A balanced, healthy lifestyle in all its facets is what yields the best benefits.