The immune health market has become one of the leading segments of the global dietary supplement industry, with the “immune support” category reaching a market size of more than RMB 19.89 billion in 2025. Behind this substantial figure is sustained consumer interest in maintaining immune health and supporting the body’s natural defenses. Echinacea, a botanical with hundreds of years of traditional use in North America, has emerged as one of the most representative classic ingredients in the immune health sector.
Echinacea purpurea is a perennial herb in the Asteraceae family, commonly known as purple coneflower. Its biological activity is associated with a diverse range of phytochemicals, particularly alkamides, caffeic acid derivatives, and polysaccharides. Research has investigated these compounds for their potential roles in immune modulation, inflammation, antioxidant defense, and other biological processes.
Studies over the past two decades have provided evidence for several mechanisms underlying the immunomodulatory activity of Echinacea. Alkamides have been shown to interact with cannabinoid receptor type 2 (CB2), while Echinacea polysaccharides and other extract components have been investigated for their effects on macrophages, dendritic cells, NK cells, and T-cell responses. Clinical research has also explored Echinacea supplementation in the context of upper respiratory tract infections.
Beyond immune health, Echinacea has demonstrated antioxidant, hepatoprotective, neuroprotective, and wound-healing potential in various experimental studies. Its long history of use and growing body of scientific research have helped establish Echinacea as an important botanical ingredient in the global herbal supplement market, particularly in the United States.
Echinacea: From Botanical Plant to Immunomodulator
With consumers increasingly focused on immune health, botanical ingredients with a long history of traditional use and an expanding scientific evidence base have attracted considerable attention. Among them, Echinacea stands out as a classic botanical ingredient that has been extensively studied for its potential role in immune regulation and respiratory health.
Kotula, M.; Kobylińska, Z.; Och, E.; Kielar, P.; Galiniak, S.; Mołoń, M. From Phytochemical Diversity to Clinical Translation: Preparation-Dependent Bioactivity of Echinacea purpurea. Int. J. Mol. Sci. 2026, 27, 7574.
Modern research has found that Echinacea contains a variety of bioactive compounds, mainly including alkamides, caffeic acid derivatives, and polysaccharides.
1) Alkamides
Alkamides are key bioactive compounds in Echinacea. These natural compounds are formed through the connection of fatty acids, mainly unsaturated straight-chain acids, with amine molecules through amide bonds. They are primarily found in the roots of Echinacea.
Research has found that alkamides may exert immunomodulatory effects by binding to cannabinoid receptor type 2 (CB2). In addition, alkamides have been reported to possess antibacterial, diuretic, analgesic, and antioxidant activities.
Kotula, M.; Kobylińska, Z.; Och, E.; Kielar, P.; Galiniak, S.; Mołoń, M. From Phytochemical Diversity to Clinical Translation: Preparation-Dependent Bioactivity of Echinacea purpurea. Int. J. Mol. Sci. 2026, 27, 7574.
2) Caffeic Acid Derivatives
Echinacea is known to contain a variety of caffeic acid derivatives, including chicoric acid, caffeic acid, chlorogenic acid, cynarin, and echinacoside. Among these compounds, chicoric acid is considered one of its major active constituents and is particularly abundant in the roots and petioles. Its content can reach 1.2%–3.1% of dry weight in the roots and 0.6%–2.1% in the flowers.
Chicoric acid is produced through a unique acyltransferase-dependent biosynthetic pathway and has demonstrated significant antioxidant activity.
3) Polysaccharides
Echinacea polysaccharides are mainly concentrated in the inflorescences and leaves. Their major components include arabinogalactans, rhamnoarabinogalactans, and 4-O-methylglucuronoarabinoxylans.
Research on the Immunomodulatory Effects of Echinacea
As early as 2006, Echinacea alkamides were identified as CB2 receptor-specific agonists capable of exerting immunomodulatory and anti-inflammatory effects through this receptor. This finding provided a molecular explanation for the immune-related activity of Echinacea.
In 2017, several in vitro studies further validated the immune-activating effects of Echinacea from different immune-cell perspectives. An Echinacea polysaccharide-enriched extract (EE), for example, was found to induce macrophage polarization toward the M1 phenotype through the JNK pathway, thereby enhancing macrophage phagocytic and bactericidal activity. At the same time, EE was able to activate the MAPK and NF-κB signaling pathways and promote dendritic cell maturation.
In 2021, a study using an oral administration model in mice demonstrated that Echinacea extract could significantly enhance NK cell activity in vivo and promote the differentiation of CD4+ T cells toward a Th1-type immune response, providing evidence for its potential to enhance overall immune defense in the body.
In 2022, researchers further advanced the understanding of Echinacea’s immunoregulatory effects. The study showed that the activities of Echinacea extracts varied depending on the extraction solvent. Aqueous extracts could activate resting macrophages and initiate basal immune responses, while in an LPS-induced inflammatory model, different types of extracts were able to suppress excessive inflammatory responses. These findings suggest that Echinacea may have the potential to exert bidirectional immunomodulatory effects.
A 2025 meta-analysis including nine randomized controlled trials and a total of 1,518 participants showed that Echinacea could significantly shorten the duration of upper respiratory tract infections and reduce their incidence. Other research has indicated that Echinacea may help prevent respiratory infections and reduce antibiotic prescriptions by 76.3%, providing further clinical evidence for its potential application in immune modulation.
Beyond Immune Support: Other Potential Benefits
In addition to its immunomodulatory properties, Echinacea has also been investigated for antioxidant, anti-inflammatory, neuroprotective, hepatoprotective, and wound-healing effects.
1) Antioxidant Activity
Studies have demonstrated that Echinacea can enhance the activity of endogenous antioxidants. In multiple in vivo and in vitro experiments, Echinacea has exhibited iron-reducing and free-radical-scavenging activities. These effects may help alleviate oxidative stress by inhibiting the generation of reactive oxygen species, reducing lipid peroxidation, and regulating glutathione levels.
Its antioxidant activity is mainly attributed to its abundance of phenolic compounds and polysaccharides.
2) Liver Protection
The liver is the largest organ in the human body and plays a critical role in immune support and metabolic regulation. Research has shown that, in hepatitis B virus transgenic mice, echinacoside could significantly inhibit the expression of hepatitis B surface antigen (HBsAg) and hepatitis B e antigen (HBeAg), while also reducing serum hepatitis B virus DNA levels.
3) Neuroprotective Effects
The potential neuroprotective effects of Echinacea have also gradually attracted attention. A 2023 study investigated the protective effects of Echinacea ethanol extract against bifenthrin-induced brain injury in rats. The results showed that echinacoside could activate the PI3K/AKT/Nrf2/PPARγ pathway, inhibit Aβ amyloid deposition, reduce NLRP3 inflammasome activation, and improve spatial learning and memory in mice.
Another study also indicated that alkamides in Echinacea could significantly improve motor sensitivity, grip strength, and coordination in mice with Parkinson’s disease-related neuroinflammation.
Echinacea in the Global Herbal Supplement Market
Echinacea has become a representative ingredient in the global herbal supplement market. The United States is the world’s largest consumer market for Echinacea supplements.
According to the 2024 Herbal Supplement Market Report published by the American Botanical Council (ABC), Echinacea ranked 17th among herbal supplements sold through mainstream retail channels in the United States and 14th in natural health channels. Historically, Echinacea has ranked as high as second in the U.S. herbal supplement market, reflecting its long-standing consumer recognition in the American herbal products market.
In addition, data from PW Consulting indicate that the U.S. Echinacea supplement market reached US$376.4 million in 2025, accounting for 41.1% of the global market.
With its long history of traditional use, diverse phytochemical profile, growing scientific evidence, and established position in the herbal supplement market, Echinacea continues to attract attention as a botanical ingredient for immune health and broader wellness applications.
References
[1] Kotula, M.; Kobylińska, Z.; Och, E.; Kielar, P.; Galiniak, S.; Mołoń, M. From Phytochemical Diversity to Clinical Translation: Preparation-Dependent Bioactivity of Echinacea purpurea. Int. J. Mol. Sci. 2026, 27, 7574.
[2] Ahmadi, F. Phytochemistry, Mechanisms, and Preclinical Studies of Echinacea Extracts in Modulating Immune Responses to Bacterial and Viral Infections: A Comprehensive Review. Antibiotics 2024, 13, 947.
[3] Ahmadi, F.; Kariman, K.; Mousavi, M.; Rengel, Z. Echinacea: Bioactive Compounds and Agronomy. Plants 2024, 13, 1235.
[4] Nagoor Meeran MF, Javed H, Sharma C, Goyal SN, Kumar S, Jha NK, Ojha S. Can Echinacea be a potential candidate to target immunity, inflammation, and infection—the trinity of coronavirus disease 2019. Heliyon. 2021 Feb;7(2):e05990.