Dear Mrs. Newton,
My boyfriend, Jeff, is in med school and with all that studying, he has gained a few pounds. I have modified my shopping list and changed my meal preparation habits to accommodate his need to shed the weight. The other day, I was in the herbal section of the grocery store, and I saw another way I could help. I bought a bottle of Green Tea Extract which many of my friends use in their weight loss struggles. I made him a present of the bottle two weeks ago. This morning, I ran out of toothpaste, and, when I opened his side of the medicine cabinet to borrow his tube, I spotted the gift bottle. The seal was still intact. Why hasn't he taken the pills?
Tea-ed Off
Dear TO,
Your boyfriend is preparing for a career in medicine, and doctors take drugs very seriously. Drugs are regulated and are subjected to rigorous testing before they are approved for use in humans and they continue to be monitored after market introduction so that data are gathered on any side effects that occur. Manufacturers may not claim any benefits for a product that have not been proven in properly designed and executed clinical tests. These tests not only demonstrate the efficacy of a drug, but delineate how the drug works, and determine the dose and regimen that will produce the desired result and avoid side effects. By contrast, nutritionals often have been used for centuries and their usefulness to treat a particular ailment is supported by folk wisdom. Today, we know much more about the chemical structure and activity of nutritional supplements like the green tea catechins, but the scientific testing to prove their efficacy and detail their optimum use as a medicine has not been done or has been shown in studies that are too small to be definitive. Evidence that green tea extracts play a role in fat oxidation (fat burning) and thermogenesis (heat production in the body) is tantalizing, but there is no proof that any of these substances can be used therapeutically to achieve weight loss. Your boyfriend might be more interested in a product backed by a large body of clinical studies. ALLI (Orlistat), a weight loss aid made by GlaxoSmithKline, is an example. Doctors and other people with scientific training do not believe product claims unless that are backed up by tests. Don't be too hard on Jeff, if the little bottle gets shoved to the back of the medicine cabinet.