What We Think We Know For Sure

A few weeks ago my niece was in the mall talking on her phone to her mom, my sister. In the middle of the conversation, a man working there walked up and interrupted to tell her that it was a proven scientific fact that holding a cellular phone next to her head would cause brain cancer. She politely thanked him and continued her conversation.

In point of fact, there is no such proven science, and this has been known for many years. This government website states: “The only consistently recognized biological effect of radiofrequency energy is heating…Radiofrequency exposure from cell phone use does cause heating to the area of the body where a cell phone or other device is held (ear, head, etc.). However, it is not sufficient to measurably increase body temperature, and there are no other clearly established effects on the body from radiofrequency energy.” They go on to cite findings from several organizations including the American Cancer Society, the FDA and the CDC. Those groups’ conclusions vary slightly between evidence not strong enough, no conclusive evidence and no relationship.

But people get these ideas stuck in their heads and swear by them. Even if you can quote the findings, backing them up with links and references, they will likely not change their minds. A couple of similar examples come from omega-3 fatty acids and dairy fat from milk and butter. Many believe the former is good for your heart, so gulp down the fish oil pills, and the latter causes heart problems. New research puts both these ideas in doubt.

From a recent Medical News Today article: “Studies have shown that those who consume fish regularly as part of a healthful, balanced diet are at a lower risk of heart problems. But the National Institutes of Health (NIH) explain that research is unclear as to whether these benefits come from fish or omega-3 in particular.” So no one knows if omega-3 itself has a positive effect, yet 20 million Americans buy supplements believing that they are doing the heart-healthy thing.

The HIH study reviewed 79 randomized trials with a total of over 112,000 subjects, which looked at the cardiovascular effects of taking omega-3 supplements. The supplements had "little or no effect" on death risk from any causes or on the risk of cardiovascular events, stroke, or irregular heartbeat. Eating walnuts or fortified products such as margarine "probably makes little or no difference.” Their overall conclusion – “Diet may help, but supplements do not.”

Of course advertisers take advantage of any misconception. They keep posting contains omega-3 on packages. If enough people believed in it and were influenced to buy, companies would add any substance endorsed by the current craze. (At least the superstitious American health enthusiasts don’t endanger elephants and rhinos like their Asian counterparts do.)

On the opposite side of the fence is the dairy industry. We have been misinformed for the last 60 years about the harmful effects of fat, told to avoid whole milk and butter. The theory was that fat eaten was absorbed into the blood and distributed around the body – wrong. The problem is sugar, but the fat-banners won the battle for the hearts and minds of the public and the politicians. 

Hence, average per capita annual milk consumption in America has dropped from 30 gallons in 1970s to 18 gallons today. This report tells of a new study of 2,907 adults that found “people with higher and lower levels of dairy fats in their blood had the same rate of death during a 22-year period.” They describe it as part of an “ongoing vindication process for saturated fats” like those found in milk, cheese, and butter. (Even 15 years ago the evidence was coming to light.) “The researchers concluded that dairy-fat consumption later in life does not significantly influence total mortality.’”

What do advertisers and food companies do in light of the facts that have been emerging over the last ten years? They play to the misinformed and to the conventional wisdom by developing (more expensive) milk from almonds, soybeans, cashews, hemp, rice, etc. to save the health-conscious from the dreaded “moo-juice.” They prominently display omega-3 (and other hyped-up additives) on their labels to give the impression of putting our health ahead of profits. It's left to the consumer to sort it out. Be skeptical, not gullible.