Herbal traditions have used these plants for centuries, but we like to go a step further and look at what modern research actually shows. Below are ten herbs in our Candida & Mycosis blend, along with a plain-language look at the peer-reviewed studies behind each one.
Lemon Verbena (Aloysia citrodora)
In a direct comparison against the pharmaceutical antifungals nystatin and fluconazole, both ethanolic and aqueous extracts of lemon verbena leaves showed measurable anti-candida activity against clinical isolates and a standard strain of Candida albicans. Separately, lemon verbena essential oil showed antifungal activity against a full panel of Candida species — including several strains that were resistant to fluconazole — pointing to a mechanism distinct from conventional antifungal drugs. A chemometric study of lemon verbena extracts from multiple growing regions confirmed consistent antifungal activity against Candida albicans alongside strong antioxidant and anti-inflammatory properties. 🔗 Anti-candida comparison study (PMC) · Fluconazole-resistant strain study (PubMed) · Chemometric antifungal study (PMC)
Holy Basil (Ocimum sanctum)
A systematic review of in vitro microbial studies concluded that Ocimum sanctum has a consistent, effective anti-candidal property across the available research, suggesting its potential use as an adjunct alongside standard antifungal care. In a targeted study, Ocimum sanctum essential oil inhibited key virulence factors in 22 clinical strains of Candida albicans, including the production of enzymes the fungus needs to invade tissue and its transition into the more invasive filamentous growth form. A comparative in vitro study found Tulsi extract to be the most effective of several tested natural antifungals — including garlic, cinnamon, and lemongrass — against Candida albicans. 🔗 Systematic review (PubMed) · Virulence factor study (PubMed) · Comparative antifungal study (PMC)
Lavender (Lavandula angustifolia)
In testing against 50 clinical isolates of Candida albicans from both oropharyngeal (mouth and throat) and vaginal infections, lavender essential oil showed both fungistatic and fungicidal activity, killing 100% of tested cells within 15 minutes at a 2% concentration and effectively blocking the fungus's transition into its more invasive, filamentous growth form. Separately, lavender essential oil was shown to act as an effective enhancer of fluconazole, producing a synergistic effect against Candida albicans when combined with the standard antifungal drug. In a clinical in vitro study directly comparing lavender essential oil to clotrimazole, a standard antifungal medication, on patient-isolated Candida albicans samples, lavender demonstrated a meaningful reduction in fungal growth. 🔗 Clinical isolate study (PubMed) · Fluconazole synergy study (PMC) · Clotrimazole comparison study (PMC)
Lemon Balm (Melissa officinalis)
In testing against 49 vulvovaginal Candida isolates from women with recurrent infections, lemon balm essential oil was effective against strains that were already resistant to both fluconazole and nystatin — the two most commonly used pharmaceutical antifungals — highlighting its potential for treatment-resistant cases. In a screening of seven essential oils from the mint family, lemon balm and oregano showed the strongest anti-candida activity of all the plants tested, with effectiveness at very low concentrations. Separately, a lemon balm essential oil-infused hydrogel significantly reduced Candida albicans growth in a laboratory model designed specifically to treat oral candidiasis. 🔗 Resistant vulvovaginal isolate study (PMC) · Lamiaceae comparison study · Oral candidiasis hydrogel study (PMC)
Calendula (Calendula officinalis)
In a randomized controlled clinical trial, a Calendula officinalis vaginal cream was compared head-to-head against clotrimazole, a standard pharmaceutical antifungal, in 150 women with vaginal candidiasis — calendula was somewhat slower to clear the infection initially but showed a significantly greater long-term effect at the follow-up visit weeks later. In laboratory testing, calendula flower essential oil inhibited the growth of Candida albicans along with several other Candida species, with inhibition zones as wide as those produced by reference antifungal compounds. Separately, methanol and ethanol extracts of calendula petals showed excellent antifungal activity against tested fungal strains when directly compared with fluconazole. 🔗 Randomized clinical trial · Essential oil antifungal study · Petal extract vs. fluconazole study (PubMed)
Olive Leaf (Olea europaea)
Laboratory testing found that olive leaf extract had a clear, concentration-dependent effect on the viability of Candida albicans and the related species C. dubliniensis. Separately, oleuropein, the main polyphenol in olive leaf, showed direct antifungal activity against Candida albicans and was found to trigger apoptosis (programmed cell death) in the fungal cells as its primary mechanism, while also disrupting the fungus's ability to convert into its more invasive form. In a study on real clinical oral Candida isolates from patients, olive leaf extract showed a statistically significant antifungal effect across multiple Candida species, and combining it with standard antifungal medications produced a synergistic benefit. 🔗 Candida viability study (PubMed) · Oleuropein mechanism study (PubMed) · Clinical oral isolate study (PMC)
Oregano (Origanum vulgare)
In testing against clinical Candida albicans isolates, oregano essential oil showed the highest antifungal activity among four commonly used culinary herbs and reduced key virulence factors — adherence, biofilm formation, and the enzyme production the fungus needs to invade tissue — at low concentrations. In a study designed to model vulvovaginal candidiasis, exposing antifungal-resistant Candida biofilms to the vapor phase of oregano essential oil produced a significant reduction in fungal load, and the effect held up in a reconstituted vaginal tissue model. Separately, carvacrol, oregano's main active compound, was shown to disrupt the internal vacuole structure of Candida cells, providing a detailed mechanistic explanation for its established antifungal effects. 🔗 Virulence factor study (PubMed) · Vaginal candidiasis model study (PMC) · Carvacrol mechanism study (PMC)
Sage (Salvia officinalis)
In a head-to-head comparison, sage essential oil demonstrated antifungal activity comparable to standard synthetic antifungal agents, with particularly strong effectiveness against the difficult-to-treat species Candida glabrata. In a study focused on denture-related candidiasis, sage essential oil showed genuine anticandidal activity and reduced the ability of Candida albicans cells to adhere to denture resin material, a key step in establishing infection. A comparative study of essential oils from three Salvia species confirmed meaningful antifungal activity against a range of pathogenic Candida species, with effectiveness varying by the plant's specific chemical composition. 🔗 Comparison to synthetic antifungals · Denture adhesion study (PMC) · Salvia species comparison study
Purple Loosestrife (Lythrum salicaria)
In a broad antimicrobial screening of 29 Finnish plant extracts, purple loosestrife was identified as the single most active plant extract against Candida albicans among everything tested, standing out even among many other traditionally used botanicals. A more recent comparative study specifically evaluated the anti-candida activity and phenolic content of purple loosestrife plant material, confirming genuine antifungal potential tied to its polyphenol content. A broader review of the plant's biological activity summarized its established antimicrobial, antioxidant, and anti-inflammatory effects, supporting its traditional European use for skin and mucous membrane conditions. 🔗 Finnish plant screening study · Anti-candida comparative study (PubMed) · Biological activity review (PMC)
Nettle (Urtica dioica)
In a recent study focused specifically on Candida albicans, nettle aqueous extract and essential oil suppressed the fungus's growth and significantly inhibited its virulence factors, including its ability to switch into a more invasive growth form; the essential oil also showed a synergistic effect when combined with amphotericin B, a potent pharmaceutical antifungal, suggesting nettle could help lower the effective dose needed and reduce related side effects. In a broader antimicrobial screening, nettle extracts prepared with different solvents showed measurable antifungal activity against yeast and fungal isolates alongside their antibacterial effects. Separately, a cold methanol extract of nettle showed marked inhibitory activity against several dermatophyte fungi responsible for skin and nail mycosis — including Trichophyton rubrum, Trichophyton mentagrophytes, and Microsporum canis — as well as against Aspergillus fumigatus, supporting nettle's relevance for fungal skin infections specifically, not just candidiasis. 🔗 Candida virulence/amphotericin B synergy study· Antimicrobial screening study (PubMed) · Dermatophyte antifungal study
Why This Matters
Each of these herbs has been studied individually for its effects against Candida species and other fungal pathogens — largely in laboratory testing on clinical isolates, with real human clinical trial evidence for both calendula and lavender against vaginal candidiasis specifically. We combine them because their documented modes of action work against fungal infection from several different angles: disrupting the fungal cell membrane and internal structures, blocking the switch to the more invasive filamentous growth form, breaking down protective biofilms, and in some cases remaining effective against strains that have already developed resistance to standard pharmaceutical antifungals like fluconazole.
This post is for educational purposes and summarizes existing scientific literature. It is not medical advice, and our blend is not intended to diagnose, treat, cure, or prevent any disease. Please consult a healthcare provider before using herbal supplements for a suspected fungal infection, especially if you are pregnant, breastfeeding, immunocompromised, or have a recurrent or systemic infection that requires proper diagnosis and monitoring.