Supplement Safety Myths & Facts

MYTH: If it's natural, it must be good for you.

FACT: While research has shown many natural treatments to be safe and effective, they should be taken with consideration.

While many vitamins, minerals, and herbs are known to safely prevent or treat a variety of diseases, they work by altering your body chemistry—just like a medicine from your pharmacy. So before you take an herb or supplement, find out how it might interact with medications you are already taking. Sometimes an interaction can mean that a medicine is depleting vital nutrients from your body, and that an extra vitamin supplement is best for your health—but it's always a good idea to check. It’s also important to never discontinue or change dosage of a medication in favor of a natural treatment unless supervised by a doctor.
MYTH: Everything I need to know about a supplement I can read on the bottle.

FACT: Government regulations restrict manufacturers from making specific health claims—even those based on results of scientific studies.
To find out about the potential benefits and risks of taking a supplement start by doing a little research. It’s always wise to talk to a knowledgeable healthcare professional before taking any supplement, especially if you are taking medications. Also, special safety considerations apply to pregnant or breast-feeding women and to children.

To learn what scientific research has found about your medication’s interactions with herbs or supplements, look in Healthnotes Rx Answers. For reported side effects of a specific herb or nutritional supplement, look it up in Vitamins & Herbs.

MYTH: The latest scientific research is the last word on a supplement’s safety or effectiveness.

FACT: The quality of the full body of research should be considered—not just the latest.

In scientific process, scientists never consider one single study to be the last word; rather, each new study is added to previous research and becomes part of the medical community’s “discussion.”
Keep in mind that when the news media report on new studies, they tend to look for the sensational. Though thousands of studies are published every year showing the benefits of herbs and supplements for a wide range of diseases, studies that make the news are frequently those that claim a supplement is dangerous or doesn’t work. On the other hand, some research is conducted by groups that stand to profit from positive results, such as a supplement manufacturer “proving” that their supplement works for a particular health condition.

The next time you see a headline splashed across the news—especially about those supplements that continue to be the subject of heated debate, such as St. John’s wort, echinacea, vitamin E, vitamin C, ginkgo, ephedra, and kava—keep some perspective by thinking about the following:

Who is doing the reporting? Is it a health column describing the study itself? A TV reporter relating second- or third-hand news from a press release or conference proceedings?

How strong is the evidence? (Some studies lead to convincing conclusions while others are preliminary.)

Are the results published in a scientific journal?

Did the researchers use a control group to compare treatment results with the experiences of people who didn't use it? (If not, improvement attributed to a treatment may be a placebo affect.)

Was the supplement given in a form and amount, and for a duration, that could be expected to be effective?

Was the study conducted by people who have no vested interest in the outcome?

Is there a body of research that suggests it may help with a particular health condition?

Caution: It is never advisable to discontinue or change dosage of a medication and/or begin a different treatment without a doctor's supervision.

MYTH: Medicines are always more effective than natural treatments.

FACT: Some natural treatments can be at least as effective as medicines; however, it's important to properly evaluate treatment options before deciding which to use.

When you are considering treatment options, discuss the following with your healthcare provider when considering what to try:

What are the risks of delaying known effective treatment in order to try an alternative remedy?

Is the body of research on a supplement’s effectiveness positive or inconclusive, and does it appear to be safe when taken in the proper amounts?

How strong is the evidence for the medical treatment, and what is the expected degree of improvement from taking it?

Are a supplement’s costs equivalent or less than those of the medicines used to treat the same condition?

How do the potential dangers of taking the supplement compare with the relative dangers of taking the over-the-counter or prescription medicine?

Asking such questions will help you interpret the significance of scientific findings. To find answers, talk to a knowledgeable professional, and use a science-based resource, such as Healthnotes, that provides an evaluation of up-to-date research.

Being informed is the best way to make good decisions for your health.


Learn more
Children & Supplement Safety
Why Take Vitamins?
Supplement Safety in Pregnancy
How Do I Pick the Right Vitamins?
Understanding Herbal Terminology

Jenefer Angell, MALS, MA, has edited fiction and nonfiction material for software, books, Web sites, and other publishing formats. As Healthnotes managing editor, she has come to understand the complexities of sorting out scientific evidence.