Herbs, Herbal treatment
Many herbs have a long history of use and of claimed health benefits. However, some herbs have caused health problems for users. This fact sheet contains points you should consider for your safety if you use, or are thinking about using, herbs for health purposes. It does not discuss whether herbs work for specific diseases and conditions.
What You Should Know:
Are herbal health products and supplements safe because they’re natural?
Unlike prescription and over-the-counter (OTC) medicines, herbal products and supplements don’t have to be tested to prove they work well and are safe before they’re sold. Also, they may not be pure. They might contain other ingredients, such as plant pollen, that could make you sick. Sometimes they contain drugs that aren’t listed on the label, such as steroids or estrogens. Some of these products may even contain toxic (poisonous) substances, such as arsenic, mercury, lead and pesticides.
What types of herbal products and supplements are available?
Some of the most popular herbal products and supplements include chondroitin sulfate, echinacea, ephedra (also called ma huang), garlic, ginkgo biloba, ginseng, glucosamine, kava, melatonin, phytoestrogens (such as black cohosh, dong quai and soy), saw palmetto and St. John’s wort.
Do any health problems increase the danger of taking herbal products
What are possible side effects of herbal products and supplements?
Can herbal health products or supplements change the way prescription
or OTC drugs work?
You should be especially cautious about using herbal health products or supplements if you take a drug in one of the following categories:
Can herbal health products and supplements cause other problems?
About Dietary Supplements
Dietary supplements were defined in a law passed by Congress in 1994. A dietary supplement must meet all of the following conditions:
It is a product (other than tobacco) intended to supplement the diet, which contains one or more of the following: vitamins; minerals; herbs or other botanicals; amino acids; or any combination of the above ingredients.
It is intended to be taken in tablet, capsule, powder, softgel, gelcap, or liquid form.
It is not represented for use as a conventional food or as a sole item of a meal or the diet.
It is labeled as being a dietary supplement.
It's important to know that just because an herbal supplement is labeled "natural" does not mean it is safe or without any harmful effects. For example, the herbs kava and comfrey have been linked to serious liver damage.
Herbal supplements can act in the same way as drugs. Therefore, they can cause medical problems if not used correctly or if taken in large amounts. In some cases, people have experienced negative effects even though they followed the instructions on a supplement label. Women who are pregnant or nursing should be especially cautious about using herbal supplements, since these products can act like drugs. This caution also applies to treating children with herbal supplements.
It is important to consult your health care provider before using an herbal supplement, especially if you are taking any medications (whether prescription or over-the-counter). Some herbal supplements are known to interact with medications in ways that cause health problems. Even if your provider does not know about a particular supplement, he can access the latest medical guidance on its uses, risks, and interactions.
If you use herbal supplements, it is best to do so under the guidance of a medical professional who has been properly trained in herbal medicine. This is especially important for herbs that are part of an alternative medical system such as the traditional medicines of China, Japan, or India.
Alternative medical systems are built upon complete systems of theory and practice, and have often evolved apart from and earlier than the conventional medical approach used in the United States. To find out more, see NCCAM's fact sheet "What Is Complementary and Alternative Medicine?"
In the United States, herbal and other dietary supplements are regulated by the U.S. Food and Drug Administration (FDA) as foods. This means that they do not have to meet the same standards as drugs and over-the-counter medications for proof of safety, effectiveness, and what the FDA calls Good Manufacturing Practices.
The active ingredient(s) in many herbs and herbal supplements are not known. There may be dozens, even hundreds, of such compounds in an herbal supplement. Scientists are currently working to identify these ingredients and analyze products, using sophisticated technology. Identifying the active ingredients in herbs and understanding how herbs affect the body are important research areas for the National Center for Complementary and Alternative Medicine.
Published analyses of herbal supplements have found differences between what's listed on the label and what's in the bottle. This means that you may be taking less--or more--of the supplement than what the label indicates. Also, the word "standardized" on a product label is no guarantee of higher product quality, since in the United States there is no legal definition of "standardized" (or "certified" or "verified") for supplements.
Some herbal supplements have been found to be contaminated with metals, unlabeled prescription drugs, microorganisms, or other substances.
Botanical Dietary Supplements:
What is a botanical?
In naming botanicals, botanists use a Latin name made up of the genus and species of the plant. Under this system the botanical black cohosh is known as Actaea racemosa L., where "L" stands for Linneaus, who first described the type of plant specimen. In the Office of Dietary Supplements (ODS) fact sheets, we do not include such initials because they do not appear on most products used by consumers.
Can botanicals be dietary supplements?
As defined by Congress in the Dietary Supplement Health and Education Act (http://www.fda.gov/opacom/laws/dshea.html#sec3), which became law in 1994, a dietary supplement is a product (other than tobacco) that
How are botanicals commonly sold and prepared?
Are botanical dietary supplements standardized?
Dietary supplements are not required to be standardized in the United States. In fact, no legal or regulatory definition exists for standardization in the United States as it applies to botanical dietary supplements. Because of this, the term "standardization" may mean many different things. Some manufacturers use the term standardization incorrectly to refer to uniform manufacturing practices; following a recipe is not sufficient for a product to be called standardized. Therefore, the presence of the word "standardized" on a supplement label does not necessarily indicate product quality.
Ideally, the chemical markers chosen for standardization would also be the compounds that are responsible for a botanical's effect in the body. In this way, each lot of the product would have a consistent health effect. However, the components responsible for the effects of most botanicals have not been identified or clearly defined. For example, the sennosides in the botanical senna are known to be responsible for the laxative effect of the plant, but many compounds may be responsible for valerian's relaxing effect.
Are botanical dietary supplements safe?
The action of botanicals range from mild to powerful (potent). A botanical with mild action may have subtle effects. Chamomile and peppermint, both mild botanicals, are usually taken as teas to aid digestion and are generally considered safe for self-administration. Some mild botanicals may have to be taken for weeks or months before their full effects are achieved. For example, valerian may be effective as a sleep aid after 14 days of use but it is rarely effective after just one dose. In contrast a powerful botanical produces a fast result. Kava, as one example, is reported to have an immediate and powerful action affecting anxiety and muscle relaxation.
The dose and form of a botanical preparation also play important roles in its safety. Teas, tinctures, and extracts have different strengths. The same amount of a botanical may be contained in a cup of tea, a few teaspoons of tincture, or an even smaller quantity of an extract. Also, different preparations vary in the relative amounts and concentrations of chemical removed from the whole botanical. For example, peppermint tea is generally considered safe to drink but peppermint oil is much more concentrated and can be toxic if used incorrectly. It is important to follow the manufacturer's suggested directions for using a botanical and not exceed the recommended dose without the advice of a health care provider.
Does a label indicate the quality of a botanical dietary supplement
What methods are used to evaluate the health benefits and safety of
a botanical dietary supplement?
Information about some of herbs:
Achillea | Activated Charcoal | Alfalfa | Allium | Aloe | Amla | Anise | Apricot | Arnica | Arrowroot | Artemisia | Artichoke | Ashwagandha | Asparagus | Astragalus | Avena Sativa | Bacopa | Barberry | Barley Grass | Bearberry | Beeswax | Bentonite Clay | Bilberry | Bitter Orange | Black Cohosh | Black Walnut | Bladderwrack | Blessed Thistle | Bloodroot | Boldo | Borage | Bromelain | Buchu | Bupleurum | Burdock | Butcher Broom | Butterbur | Calendula | California Poppy | Camellia | Capsicum | Caraway | Cardamom | Cascara Sagrada | Catnip | Cats Claw | Catuaba | Celandine | Celery Seed | Chamomile | Chicory | Chlorella | Cilantro | Citrimax | Clematis | Clove | Cohosh | Coltsfoot | Comfrey | Cordyceps | Coriander | Cramp Bark | Cranberry | Crataegus | Curcuma | Damiana | Dandelion | Devil Claw | Dhea | Dioscorea | Dong Quai | Echinacea | Elderberry | Eleuthero | Ephedra | Equisetum | Essiac | Eucalyptus | Evening Primrose | Eyebright | Fennel | Fenugreek | Feverfew | Flaxseed | Fo-ti | Garcinia Cambogia | Garlic | Gentian | Ginger | Ginkgo | Ginseng | Glucomannan | Goldenrod | Goldenseal | Gotu Kola | Grape Seed | Graviola | Green Tea | Guarana | Guggul | Gugulipid | Gymnema | Hawthorn Berries | Hoodia | Horehound | Horny Goat Weed | Horse Chestnut | Horsetail | Hydrangea | Hydrocotyle | Hyssop | Index | Irish Moss | Juniper Berries | Kava Kava | Kelp | Kola Nut | Kudzu | Lavendar | Lemon Balm | Lemon Grass | Lemon Verbena | Licorice | Lobelia | Ma Huang | Maca | Maitake | Marigold | Marjoram | Meadowsweet | Mentha | Milk Thistle | Mistletoe | Motherwort | Mugwort | Muira Puama | Mullein | Neem | Nettle | Noni | Nutmeg | Olive Leaf | Panax | Parsley | Passiflora | Passion Flower | Pau Darco | Pennyroyal | Propolis | Psyllium | Pycnogenol | Pygeum | Quercetin | Red Clover | Red Raspberry | Red Yeast Rice | Reishi Mushroom | Relora | Resveratrol | Rhodiola | Rooibos | Rose Hips | Rosemary | Sage | Salvia | Sambucol | Sarsaparilla | Savory | Saw Palmetto | Schizandra | Shiitake | Skullcap | Slippery Elm | Snakeroot | Spikenard | Spirulina | St Johns Wort | Stevia | Tansy | Tongkat Ali | Tribulus | Triphala | Turmeric | Uva Ursi | Valerian | Vitex | Watercress | Wheatgrass | White Oak | White Willow | Wild Yam | Witch Hazel | Wormwood | Yarrow | Yellow Dock | Yerba | Yohimbe
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information is intended for U.S. citizens.
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