The Amazing Statistics and Dangers of Soda Pop
:These popular beverages account for more than a quarter of all drinks consumed in the United States.
:More than 15 billion gallons were sold in 2000.
:That works out to at least one 12-ounce can per day for every man, woman and child.
Kids are heavy consumers of soft drinks, according to the U.S. Department of Agriculture, and they are guzzling soda pop at unprecedented rates.
Carbonated soda pop provides more added sugar in a typical 2-year-old toddler's diet than cookies, candies and ice cream combined.
Fifty-six percent of 8-year-olds down soft drinks daily, and a third of teenage boys drink at least three cans of soda pop per day.Not only are soft drinks widely available everywhere, from fast food restaurants to video stores, they're now sold in 60 percent of all public and private middle schools and high schools nationwide, according to the National Soft Drink Association. A few schools are even giving away soft drinks to students who buy school lunches.
As soda pop becomes the beverage of choice among the nation's young -- and as soda marketers focus on brand-building among younger and younger consumers -- public health officials, school boards, parents, consumer groups and even the soft drink industry are faced with nagging questions:
:How healthful are these beverages, which provide a lot calories, sugars and caffeine but no significant nutritional value?
:And what happens if you drink a lot of them at a very young age?
Last week, representatives of the soft drink industry, concerned that public opinion and public policy may turn against them, will staged a three-day "fly-in" to lobby Congress to maintain soft drinks sales in schools; and to educate lawmakers on the "proper perspective" on soft drink use.
The industry plans to counter a US Department of Agriculture proposal, announced in January, that would require all foods sold in schools to meet federal nutrition standards. That would mean that snack foods and soft drinks would have to meet the same standards as school lunches.
Nearly everyone by now has heard the litany on the presumed health effects of soft drinks:
:Obesity
:Tooth decay
:Caffeine dependence
:Weakened bones
But does drinking soda pop really cause those things?
To help separate fact from fiction, the Health section reviewed the latest scientific findings and asked an array of experts on both sides of the debate to weigh in on the topic. Be forewarned, however: Compared with the data available on tobacco and even dietary fat, the scientific evidence on soft drinks is less developed. The results can be a lot like soft drinks themselves, both sweet and sticky.
Obesity
One very recent, independent, peer-reviewed study demonstrates a strong link between soda consumption and childhood obesity.
Reporting in The Lancet, a British medical journal, a team of Harvard researchers presented the first evidence linking soft drink consumption to childhood obesity. They found that 12-year-olds who drank soft drinks regularly were more likely to be overweight than those who didn't.
For each additional daily serving of sugar-sweetened soft drink consumed during the nearly two-year study, the risk of obesity increased 1.6 times.
Obesity experts called the Harvard findings important and praised the study for being prospective. In other words, the Harvard researchers spent 19 months following the children, rather than capturing a snapshot of data from just one day. It's considered statistically more valuable to conduct a study over a long period of time.
Researchers found that schoolchildren who drank soft drinks consumed almost 200 more calories per day than their counterparts who didn't down soft drinks. That finding helps support the notion that we don't compensate well for calories in liquid form.
Bone Weakening
Animal studies demonstrate that phosphorus, a common ingredient in soda, can deplete bones of calcium.
And two recent human studies suggest that girls who drink more soda are more prone to broken bones. The industry denies that soda plays a role in bone weakening.
Animal studies -- mostly involving rats -- point to clear and consistent bone loss with the use of cola beverages. But as scientists like to point out, humans and rats are not exactly the same.
Even so, there's been concern among the research community, public health officials and government agencies over the high phosphorus content in the US diet. Phosphorus -- which occurs naturally in some foods and is used as an additive in many others -- appears to weaken bones by promoting the loss of calcium. With less calcium available, the bones become more porous and prone to fracture.
The soft drink industry argues that the phosphoric acid in soda pop contributes only about 2 percent of the phosphorus in the typical US diet, with a 12-ounce can of soda pop averaging about 30 milligrams.
There's growing concern that even a few cans of soda today can be damaging when they are consumed during the peak bone-building years of childhood and adolescence. A 1996 study published in the Journal of Nutrition by the FDA's Office of Special Nutritionals noted that a pattern of high phosphorus/low calcium consumption, common in the American diet, is not conducive to optimizing peak bone mass in young women.
A 1994 Harvard study of bone fractures in teenage athletes found a strong association between cola beverage consumption and bone fractures in 14-year-old girls. The girls who drank cola were about five times more likely to suffer bone fractures than girls who didn't consume soda pop.
Besides, to many researchers, the combination of rising obesity and bone weakening has the potential to synergistically undermine future health. Adolescents and kids don't think long-term. But what happens when these soft-drinking people become young or middle-aged adults and they have osteoporosis, sedentary living and obesity?