Feverfew leaf extract: What It Is, Benefits, Dosage, and Sources

Feverfew leaf extract comes from the Tanacetum parthenium plant, a perennial herb in the daisy family. Historically, people have used the plant for various ailments, with modern interest focusing on its potential for migraine relief. The extraction process concentrates compounds from the leaves, making them available in various supplement forms. Understanding what feverfew leaf extract is involves looking at its botanical origins, its active components, and how these are believed to interact with the body.

Feverfew: Usefulness and Safety | NCCIH

The National Center for Complementary and Integrative Health (NCCIH) provides a considered perspective on feverfew. They emphasize that while feverfew has a long history of traditional use, particularly for headaches and inflammation, the scientific evidence supporting its efficacy for many of these uses is still developing.

The primary area where feverfew has garnered attention is in migraine prevention. Some studies suggest that regular intake of feverfew may reduce the frequency and severity of migraine attacks in some individuals. This effect is often attributed to compounds within the plant called parthenolides. These compounds are thought to influence pathways related to inflammation and blood vessel function, both of which can play a role in migraine pathology.

However, NCCIH also highlights the importance of safety. Feverfew is not without potential side effects, and it can interact with certain medications. For example, its potential to affect blood clotting means individuals on anticoagulant drugs should exercise caution. Pregnant or breastfeeding individuals are generally advised to avoid it due to insufficient safety data. The NCCIH approach underscores the need for individuals to consult healthcare providers before incorporating feverfew into their regimen, especially given the variability in supplement formulations and the lack of standardized regulation.

Feverfew

The plant Tanacetum parthenium, commonly known as feverfew, is native to the Balkan Peninsula but has spread globally and is often found growing wild in gardens and roadsides. Its name is thought to derive from "febrifuge," reflecting its historical use in reducing fevers. Beyond fevers, traditional applications have included addressing issues like arthritis, stomach aches, toothaches, and insect bites.

The plant itself is characterized by small, daisy-like flowers with yellow centers and white petals, and aromatic, feathery leaves. While the entire plant has been used historically, modern extracts typically focus on the leaves due to their higher concentration of active compounds, particularly parthenolides. The quality and concentration of these compounds can vary significantly depending on the plant's growing conditions, harvest time, and processing methods.

Understanding the whole plant context helps to appreciate the complexity of feverfew leaf extract. The extract aims to concentrate these beneficial compounds, but it also means separating them from other plant materials that might have synergistic effects or, conversely, unwanted properties. This distinction is crucial when comparing consuming the whole herb versus a standardized extract.

Feverfew Extract - Alcohol Free Liquid

Alcohol-free liquid extracts of feverfew are a common alternative for individuals who prefer to avoid alcohol. This form typically uses glycerin or another non-alcoholic solvent during the extraction process. The primary benefit of an alcohol-free liquid extract is its suitability for those with alcohol sensitivities, religious dietary restrictions, or for children, though feverfew is generally not recommended for children without medical supervision.

The liquid format often allows for flexible dosing, as drops can be adjusted more easily than capsules. It also offers potentially faster absorption compared to solid forms, as the compounds are already dissolved. However, the taste can be a factor for some users, as herbal extracts, even alcohol-free ones, can have strong, distinct flavors.

When considering an alcohol-free liquid extract, it's important to:

• Check the solvent: Glycerin is a common alternative, but other non-alcoholic solvents might be used.
• Verify concentration: Look for information on the ratio of herb to solvent (e.g., 1:1, 1:5) and any standardization for parthenolides.
• Storage: Liquid extracts often require specific storage conditions, such as refrigeration after opening, to maintain potency.

This form provides a specific delivery method that caters to a particular set of user preferences and needs, impacting bioavailability and user experience.

Feverfew Liquid Herbal Extract

Liquid herbal extracts, whether alcohol-based or alcohol-free, involve steeping the plant material in a solvent to draw out its active compounds. Alcohol (ethanol) is a traditional and effective solvent for many herbal constituents, including those found in feverfew. An alcohol-based liquid extract is often referred to as a tincture.

The advantages of alcohol-based tinctures include:

• Potency: Alcohol can extract a wide range of compounds, often resulting in a more concentrated product.
• Preservation: Alcohol acts as a natural preservative, giving tinctures a longer shelf life compared to some other forms.
• Absorption: The compounds are readily available for absorption in liquid form.

However, the presence of alcohol means these extracts are not suitable for everyone. The alcohol content can vary, typically ranging from 20% to 90%. Users should be aware of this, especially if they have medical conditions, are taking certain medications, or wish to avoid alcohol for personal reasons.

The choice between an alcohol-free and alcohol-based liquid extract often comes down to personal preference, specific health considerations, and the desired concentration and shelf stability. Both aim to deliver the beneficial compounds of feverfew in an absorbable liquid form.

FEVERFEW LEAF EXTRACT

Feverfew leaf extract, in its general sense, refers to any preparation made by separating the active components from the feverfew leaves using a solvent. This broad category encompasses various forms, including:

• Standardized extracts: These are processed to contain a specific concentration of a known active compound, most commonly parthenolides. For feverfew, a common standardization is to 0.2% to 0.7% parthenolides. This standardization aims to provide a consistent dose of the presumed active ingredient, which can be beneficial for research and for users seeking a predictable effect.
• Whole herb extracts: These extracts aim to capture a broader spectrum of compounds present in the leaf, without necessarily standardizing to a single constituent. The idea here is that the various compounds in the plant may work synergistically.
• Dry powdered extracts: After extraction, the liquid solvent is removed, leaving a concentrated powder that can be encapsulated or pressed into tablets.

The key distinguishing factor for feverfew leaf extract is its focus on the leaves, which are generally considered the most potent part of the plant for the compounds of interest. The method of extraction and subsequent processing significantly influences the final product's composition, potency, and bioavailability. When sourcing a feverfew leaf extract, it's important to look for clarity on its form (liquid, powder), its standardization (if any), and the reputation of the manufacturer.

What Is Feverfew? Benefits, Migraine Impact, and More

Feverfew, as a plant, is more than just its extract. Its traditional uses stretch back centuries, but modern scientific inquiry has primarily focused on its potential for migraine relief.

Potential Benefits of Feverfew Leaf Extract

1. Migraine Prevention: This is the most studied and recognized potential benefit. Research suggests that regular intake of feverfew may help reduce the frequency and intensity of migraine headaches. The mechanism is thought to involve parthenolides interfering with the release of serotonin from platelets and inhibiting the aggregation of platelets, as well as influencing inflammatory pathways.
2. Anti-inflammatory Effects: Beyond migraines, feverfew has been traditionally used for various inflammatory conditions. Parthenolides are known to inhibit the activity of NF-κB, a protein complex that controls DNA transcription and is involved in inflammatory responses. This suggests a broader anti-inflammatory potential, though more targeted research is needed.
3. Pain Relief (General): Due to its historical use as an analgesic and anti-inflammatory agent, some people use feverfew for general pain relief, such as from arthritis or menstrual cramps. However, the evidence for these applications is less robust than for migraines.
4. Other Traditional Uses: Historically, feverfew was used for fevers, digestive issues, and even as an abortifacient (though this is a dangerous and unsupported use). Modern research has largely moved away from these broader traditional applications to focus on areas with more scientific promise.

Migraine Impact

The impact of feverfew on migraines is its most compelling application. The theory behind its action involves several mechanisms:

• Serotonin Release Inhibition: Migraines are sometimes linked to fluctuations in serotonin levels. Feverfew is thought to inhibit the release of serotonin from platelets, which could help stabilize blood vessel tone and prevent the cascade of events leading to a migraine.
• Prostaglandin Synthesis Inhibition: Prostaglandins are compounds that contribute to pain and inflammation. Feverfew may inhibit their synthesis, thereby reducing inflammatory responses associated with migraines.
• Vasodilation Regulation: Some components in feverfew might influence the constriction and dilation of blood vessels, potentially modulating the vascular changes that often accompany migraine attacks.

It's important to note that feverfew is generally considered a preventive measure for migraines, not an acute treatment for an ongoing attack. Its effects are typically observed after consistent use over several weeks or months.

Dosage Considerations

Determining the appropriate dosage for feverfew leaf extract can be complex due to variations in product formulations and the concentration of active compounds.

• Standardized Extracts: For products standardized to parthenolides (e.g., 0.2% to 0.7%), common dosages for migraine prevention range from 50 mg to 125 mg of the extract daily. This typically provides a daily intake of 0.2 to 0.5 mg of parthenolides.
• Whole Leaf Powder: If using dried feverfew leaf powder (not an extract), a common dosage for migraine prevention has been around 125 mg of dried leaf daily.
• Liquid Extracts: Dosages for liquid extracts (tinctures) vary widely based on the herb-to-solvent ratio and the concentration. Manufacturers' instructions should be followed closely, often involving several drops to a small dropperful once or twice daily.

Important Dosage Notes:

• Start Low, Go Slow: It's often advisable to start with a lower dose and gradually increase it to assess tolerance and effectiveness.
• Consistency is Key: For migraine prevention, feverfew typically needs to be taken consistently for several weeks or months to observe benefits.
• Individual Variability: Responses to feverfew can vary significantly between individuals. What works for one person may not work for another.
• Consult a Professional: Always discuss dosage with a healthcare provider, especially if you have underlying health conditions, are taking other medications, or are pregnant/breastfeeding.

Natural Sources of Feverfew Leaf

The most direct natural source of feverfew leaf is the feverfew plant itself (Tanacetum parthenium). It can be grown in gardens or found in the wild in many temperate regions.

• Home Cultivation: Growing feverfew at home allows for direct access to fresh leaves. These can be consumed directly (though they have a bitter taste) or dried for later use.
• Herbal Suppliers: Many herbal suppliers sell dried feverfew leaves, which can be used to make teas (though the heat might degrade some active compounds) or encapsulated at home.
• Commercial Supplements: The most common way to access feverfew leaf is through commercially prepared supplements, which come in various forms:

* Capsules/Tablets: Containing dried, powdered feverfew leaf or standardized extracts.

* Liquid Extracts/Tinctures: Alcohol-based or alcohol-free.

* Teas: While available, the effectiveness of feverfew tea for medicinal purposes is less certain due to potential degradation of active compounds with heat.

When sourcing feverfew, whether for cultivation or purchase, ensure the plant or product is identified correctly as Tanacetum parthenium to avoid confusion with similar-looking plants that do not possess the same medicinal properties.

Comparison of Feverfew Leaf Extract Forms

Choosing the right feverfew leaf extract supplement depends on individual needs, preferences, and specific health considerations. Here's a comparison of common forms:

Who should avoid feverfew?

While generally considered safe for most adults when used appropriately, certain individuals should avoid feverfew:

• Pregnant or Breastfeeding Individuals: There is insufficient research on the safety of feverfew during pregnancy and lactation. Some traditional uses suggest it can induce contractions, making it particularly risky during pregnancy.
• Individuals on Blood-Thinning Medications: Feverfew can inhibit platelet aggregation, potentially increasing the risk of bleeding when combined with anticoagulants (like warfarin) or antiplatelet drugs (like aspirin, clopidogrel).
• Individuals with Bleeding Disorders: Due to its potential effect on blood clotting, those with hemophilia or other bleeding disorders should avoid feverfew.
• Individuals Undergoing Surgery: It's generally recommended to stop taking feverfew at least two weeks before any scheduled surgery to minimize the risk of excessive bleeding.
• Children: The safety and appropriate dosage of feverfew in children have not been well established.
• Individuals Allergic to Asteraceae/Compositae Family: Feverfew is in the daisy family, which includes ragweed, chrysanthemums, marigolds, and chamomile. People with allergies to these plants may experience an allergic reaction to feverfew.
• Individuals with "Post-feverfew Syndrome": Some individuals who have taken feverfew regularly and then abruptly stop may experience rebound headaches, anxiety, insomnia, and joint pain. It's often recommended to taper off feverfew slowly.

Are chamomile and feverfew the same?

No, chamomile and feverfew are not the same, although they belong to the same plant family, Asteraceae (also known as Compositae or the daisy family). They are distinct species with different primary traditional uses and chemical compositions.

Key Differences:

• Botanical Name:

Feverfew: Tanacetum parthenium*

Chamomile: Primarily Matricaria recutita (German chamomile) or Chamaemelum nobile* (Roman chamomile)

• Primary Traditional Use:

* Feverfew: Primarily for migraines, headaches, and inflammation.

* Chamomile: Primarily for relaxation, sleep, digestive upset, and anti-inflammatory effects.

• Active Compounds: While both contain various beneficial compounds, their main active constituents differ.

* Feverfew: Rich in parthenolides, which are thought to be key for its migraine-related effects.

* Chamomile: Rich in compounds like bisabolol and chamazulene (in German chamomile), and flavonoids, which contribute to its calming and anti-inflammatory properties.

• Taste: Feverfew leaves are notably bitter. Chamomile has a milder, apple-like aroma and taste, especially when brewed as tea.
• Appearance: While both have daisy-like flowers, there are subtle differences in their growth habit, leaf shape, and flower characteristics upon closer inspection.

While both herbs have anti-inflammatory properties, their specific mechanisms and primary applications differ significantly. It's crucial not to interchange them.

Does feverfew help tinnitus?

The evidence supporting feverfew for tinnitus is limited and not conclusive. Tinnitus, often described as a ringing, buzzing, or hissing sound in the ears, has many potential causes, and effective treatments vary.

Some anecdotal reports and very early, small studies have explored feverfew's potential role in tinnitus, often based on its anti-inflammatory properties or its purported effects on blood flow. The hypothesis might be that if tinnitus is linked to inflammation or vascular issues, feverfew could theoretically offer some benefit.

However, there is no strong scientific consensus or significant body of evidence to recommend feverfew as a treatment for tinnitus. Most mainstream medical and herbal organizations do not list tinnitus as a primary or well-supported use for feverfew.

If you are experiencing tinnitus, it's important to consult a healthcare professional to determine the underlying cause and explore evidence-based treatment options. Relying solely on feverfew for tinnitus without professional guidance is not advisable.

Conclusion

A more grounded way to view thisact, derived from the Tanacetum parthenium plant, is primarily recognized for its potential role in migraine prevention, attributed largely to compounds like parthenolides. While it has a long history of traditional use for various inflammatory conditions and pain, modern research predominantly focuses on its impact on headaches. Available in various forms, including standardized capsules, whole leaf powder, and liquid extracts (alcohol-based or alcohol-free), the choice of supplement often hinges on desired potency, absorption speed, and personal preferences regarding alcohol content.

However, feverfew is not suitable for everyone. Individuals who are pregnant or breastfeeding, on blood-thinning medications, allergic to related plants, or anticipating surgery should avoid it. It is distinct from chamomile, despite both belonging to the same plant family, with different active compounds and primary uses. While some anecdotal reports exist, there is no strong scientific evidence supporting feverfew's use for tinnitus.

For curious readers seeking clear information, the key takeaway is that feverfew leaf extract holds promise as a natural option for migraine prevention for some individuals, but it requires careful consideration of dosage, potential side effects, and interactions. Always consult with a healthcare professional before incorporating feverfew, or any new supplement, into your health regimen to ensure it is appropriate for your specific circumstances.