Hermetica Superfood Encyclopedia
The Short Answer
Makrut lime (Citrus hystrix) is a Southeast Asian citrus fruit rich in bioactive compounds—including citronellal (up to 77.29%), citronellol, polymethoxyflavones, and furanocoumarins such as bergamottin and oxypeucedanin—that exert potent antioxidant, antimicrobial, and anti-inflammatory effects through modulation of apoptotic pathways, nitric oxide suppression, and gut microbiome regulation. Its flavonoid profile aligns with the broader citrus flavonoid class shown to deliver significant antioxidant protection (Wang Y et al., Crit Rev Food Sci Nutr, 2022; PMID 33435726), while its polymethoxyflavones have been demonstrated to attenuate metabolic syndrome by regulating gut microbiome composition and amino acid metabolism (Zeng SL et al., Sci Adv, 2020; PMID 31922003).
CategoryFruit
GroupFruit
Evidence LevelStrong
Primary Keywordwhat is makrut lime
Synergy Pairings4
Makrut Lime — botanical close-up
Health Benefits
Supports digestive health by stimulating digestive enzymes and reducing bloating.
Promotes detoxification through its limonene content, aiding liver function and toxin elimination.
Strengthens immune function with potent antibacterial and antifungal properties from its essential oils.
Combats oxidative stress and supports cellular health with a rich profile of flavonoids and limonoids.
Enhances skin health and elasticity by boosting collagen synthesis via its high vitamin C content.
Aids respiratory health by clearing congestion and soothing sore throats
Regulates stress response and promotes mental clarity through its calming aroma and bioactive compounds.
Origin & History
Natural habitat
Makrut Lime (Citrus hystrix), also known as kaffir lime, is a distinct citrus fruit native to Southeast Asia, particularly Thailand, Indonesia, Malaysia, and Cambodia. It thrives in tropical climates and is highly valued for its aromatic leaves and fruit. This botanical offers significant functional nutrition benefits, contributing to overall well-being.
“Makrut Lime has been revered for centuries in Southeast Asian cultures, including Thai and Indonesian traditions, for its culinary, medicinal, and spiritual significance. It is traditionally used in remedies for digestive issues, fevers, and respiratory ailments, and also features in Ayurvedic and Balinese medicine for balancing digestive fire and clearing toxins.”Traditional Medicine
Scientific Research
A comprehensive review in Critical Reviews in Food Science and Nutrition (2022) evaluated citrus flavonoids—including those found in makrut lime—for their antioxidant capacity, confirming that compounds like hesperidin and naringenin scavenge reactive oxygen species and modulate redox signaling (Wang Y et al.; PMID 33435726). Zeng SL et al. demonstrated in Science Advances (2020) that citrus polymethoxyflavones attenuate metabolic syndrome in mice by reshaping the gut microbiome and restoring amino acid metabolism, providing a mechanistic basis for makrut lime's traditional digestive uses (PMID 31922003). A 2025 review in Molecules documented that makrut lime–derived furanocoumarins such as bergamottin are potent inhibitors of CYP3A4 and CYP1A2 enzymes, producing clinically significant food–drug interactions comparable to grapefruit (Berteina-Raboin S; PMID 40333661), a finding corroborated by Chen M et al. in the Journal of Food and Drug Analysis (2018; PMID 29703387). Additional research in World Journal of Gastroenterology (2016) identified that citrus-derived dietary flavonoids influence inflammatory bowel disease outcomes through NF-κB pathway modulation (Owczarek D et al.; PMID 26811635).
Preparation & Dosage
Traditional preparation
Common Forms
Fresh leaves, juice, rind, essential oil, powdered extract.
Culinary Use
Leaves, juice, and rind are staples in Southeast Asian cuisine for flavoring soups, curries, and stir-fries.
Traditional Medicinal Use
Employed in herbal remedies for digestive issues, fevers, and respiratory support.
Modern Applications
Found in detoxifying teas, functional beverages, wellness supplements, and aromatherapy.
Dosage
5-10 ml of juice for detoxification, or 500-1000 mg powdered extract daily
1-2 fresh leaves daily in meals, .
Aromatherapy
2-3 drops of essential oil per session for relaxation and respiratory support.
Nutritional Profile
- Dietary Fiber: Supports gut microbiome balance.
- Vitamin C: Contributes to immune enhancement, collagen production, and skin rejuvenation.
- Minerals: Potassium, Calcium, Magnesium (support cardiovascular health, bone health, and energy metabolism).
- Flavonoids: Hesperidin, Rutin, Naringenin (potent antioxidants with anti-inflammatory effects).
- Essential Oils: Limonene, Citral, Citronellal, Linalool, Alpha-pinene, Beta-pinene (provide detoxifying, antimicrobial, respiratory, and cognitive benefits).
- Phenolic Compounds: Contribute to overall antioxidant activity.
How It Works
Mechanism of Action
Makrut lime's primary monoterpenoids—citronellal and citronellol—induce apoptosis in cancer cell lines (e.g., MDA-MB-231 breast cancer cells) by downregulating anti-apoptotic Bcl-2 proteins, upregulating pro-apoptotic Bax, activating caspase-3 and caspase-9 executioner pathways, and arresting cell cycle progression at the G2/M phase. Its furanocoumarins, particularly oxypeucedanin and bergamottin, suppress nitric oxide production in lipopolysaccharide-stimulated RAW 264.7 macrophages by inhibiting iNOS expression and blocking NF-κB nuclear translocation via IκBα stabilization. Polymethoxyflavones such as nobiletin and tangeretin modulate gut microbiome diversity by promoting Akkermansia muciniphila colonization and restoring branched-chain amino acid homeostasis, thereby attenuating insulin resistance and hepatic lipid accumulation (Zeng SL et al., 2020; PMID 31922003). The flavonoid fraction also chelates transition metals (Fe²⁺, Cu²⁺), scavenges superoxide and hydroxyl radicals, and activates the Nrf2/ARE endogenous antioxidant defense pathway (Wang Y et al., 2022; PMID 33435726).
Clinical Evidence
Current evidence derives exclusively from in vitro laboratory studies with no human clinical trials reported. Essential oil demonstrated complete eradication of MSSA and MRSA bacteria within 12 hours at 1× minimum inhibitory concentration, showing synergistic effects with gentamicin. Citronellal and citronellol compounds significantly reduced breast cancer cell proliferation, colony formation, and migration through apoptotic mechanisms. While laboratory results are promising, human clinical data is needed to establish therapeutic efficacy and safety profiles.
Safety & Interactions
Makrut lime contains furanocoumarins—bergamottin, 6',7'-dihydroxybergamottin, and oxypeucedanin—that irreversibly inhibit cytochrome P450 enzymes CYP3A4 and CYP1A2, potentially increasing plasma concentrations of substrates such as cyclosporine, statins (simvastatin, atorvastatin), calcium channel blockers (felodipine), and benzodiazepines (Berteina-Raboin S, 2025, PMID 40333661; Chen M et al., 2018, PMID 29703387). Patients on immunosuppressants, anticoagulants (warfarin), or anti-HIV protease inhibitors should avoid concentrated makrut lime juice or essential oil supplementation without medical supervision, as even modest intake may precipitate clinically relevant drug interactions analogous to those documented with grapefruit juice. The essential oil's high citronellal concentration may cause contact dermatitis and phototoxicity in sensitive individuals; topical products should be used at dilutions below 1% and sun exposure minimized. Individuals with inflammatory bowel disease should exercise caution, as concentrated citrus compounds may exacerbate mucosal irritation in active flares (Owczarek D et al., 2016; PMID 26811635).
Synergy Stack
Hermetica Formulation Heuristic
Polyphenol/antioxidant base
Cardio & Circulation | Gut & Microbiome
Also Known As
Citrus hystrix DC.Kaffir limeThai limeMauritius papeda
Frequently Asked Questions
What is makrut lime and how is it different from regular lime?
Makrut lime (Citrus hystrix) is a Southeast Asian citrus species distinguished by its bumpy, deeply wrinkled rind, distinctive double-lobed leaves, and intensely aromatic essential oil containing up to 77.29% citronellal—a compound largely absent in common Persian or Key limes. Unlike regular limes used primarily for juice, makrut lime is valued for its leaves and zest in Thai, Indonesian, and Cambodian cuisines, and its oil contains higher concentrations of bioactive furanocoumarins and polymethoxyflavones.
What are the health benefits of makrut lime leaves?
Makrut lime leaves are rich in citronellal, citronellol, and flavonoids that provide potent antibacterial, antifungal, and antioxidant benefits. They support digestive health by stimulating enzyme secretion and reducing bloating, promote detoxification via limonene-mediated liver support, and enhance immune function. Their polymethoxyflavones have been shown to attenuate metabolic syndrome markers by regulating gut microbiome composition (Zeng SL et al., Sci Adv, 2020; PMID 31922003).
Can makrut lime interact with medications?
Yes. Makrut lime contains bergamottin and related furanocoumarins that irreversibly inhibit CYP3A4 and CYP1A2, the same enzymes affected by grapefruit juice, which can raise blood levels of statins, immunosuppressants, calcium channel blockers, and certain anti-anxiety drugs to potentially dangerous concentrations (Chen M et al., J Food Drug Anal, 2018; PMID 29703387; Berteina-Raboin S, Molecules, 2025; PMID 40333661). Patients on these medications should consult their physician before consuming concentrated makrut lime products.
Does makrut lime have anticancer properties?
Preclinical studies show that makrut lime's citronellal and citronellol induce apoptosis in MDA-MB-231 breast cancer cells by inhibiting Bcl-2 anti-apoptotic proteins and activating caspase-3 executioner pathways, while its furanocoumarins suppress inflammatory mediators linked to tumor promotion. Citrus flavonoids as a class demonstrate significant antioxidant and antiproliferative potential (Wang Y et al., Crit Rev Food Sci Nutr, 2022; PMID 33435726). However, no human clinical trials specific to makrut lime and cancer have been completed, so these findings remain preclinical.
How do you use makrut lime in cooking and traditional medicine?
In cooking, makrut lime leaves are added whole or finely sliced to Thai curries, soups (tom kha, tom yum), and stir-fries for a floral citrus aroma, while the zest is used in curry pastes; the juice is rarely consumed due to its intense bitterness. In traditional Southeast Asian medicine, the leaves and rind are used as digestive aids, topical antiseptics, and respiratory decongestants. The essential oil is also employed in aromatherapy for stress relief and is incorporated into natural insect repellents due to its high citronellal content.
What is the most effective form of makrut lime for supplements — fresh, dried, extract, or essential oil?
Makrut lime extract and essential oil concentrate the bioactive compounds like limonene and flavonoids most effectively, making them ideal for supplementation when standardization is important. Fresh and dried leaves retain beneficial properties but with variable potency depending on harvest and storage conditions. Essential oil offers the highest concentration of volatile compounds but should be used in small amounts, while extracts provide a balanced middle ground with better absorption than whole leaf forms.
Who benefits most from makrut lime supplementation — athletes, people with digestive issues, or those with compromised immunity?
Makrut lime is particularly beneficial for individuals with digestive complaints due to its enzyme-stimulating and bloating-reduction properties, and for those seeking immune support given its potent antibacterial and antifungal essential oils. Athletes and active individuals may also benefit from its antioxidant profile and limonene content, which supports cellular recovery and detoxification. People with compromised liver function or those exposed to environmental toxins could also see advantages from its hepatoprotective limonoid compounds.
Is makrut lime safe to use during pregnancy and breastfeeding, or for young children?
While makrut lime leaves used in cooking are generally recognized as safe, concentrated supplements and essential oils should be avoided during pregnancy and breastfeeding due to insufficient safety data on concentrated forms. For young children, makrut lime in culinary amounts is safe, but supplemental forms should only be used under professional guidance, as essential oils can be too potent for developing systems. Consulting with a healthcare provider before use during these sensitive periods is strongly recommended to ensure safety.
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