Sales of health supplements have soared in recent years. It’s such a huge market that manufacturers spend around £40 million a year just telling us about their products. As supplements are either made from natural substances or mimic substances produced by our bodies, many people assume they cannot do any harm. But we’re wrong, say health professionals. They point out that the health supplement industry is unregulated, which means manufacturers are not required to list potential side-effects – nor do their products have to go through costly clinical trials. “Health supplements can produce ill effects,” warns Anna, from the British Dietetic Association.
adj. 未经调节的;未校准的