Not medical advice. I am a software engineer, not a physician. This page documents my own protocol and the research I read while building it. Talk to a qualified clinician before changing your supplementation, diet or any treatment. Lab reference ranges quoted here vary by laboratory and by individual.
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Monolaurin (glycerol monolaurate, GML) is a monoglyceride derived from lauric acid, the predominant medium-chain fatty acid found in coconut oil and human breast milk. While lauric acid itself has antimicrobial properties, its monoglyceride form — monolaurin — is approximately 5,000 times more effective at destroying lipid-coated microorganisms. This extraordinary potency was first identified by Jon Kabara, PhD, in the 1960s, and has since been validated across numerous in vitro and clinical studies.
What makes monolaurin unique in an immune support protocol is its mechanism: rather than stimulating or modulating the immune system (like vitamin C or zinc), monolaurin directly attacks pathogen structural integrity. It physically dissolves the lipid envelopes that protect many of the most common and persistent human viruses (HSV-1, HSV-2, EBV, CMV, influenza, HIV) and disrupts the cell membranes of gram-positive bacteria. It also breaks down bacterial biofilms — the protective shields that make chronic infections resistant to both antibiotics and immune attack.
Monolaurin's antimicrobial effects are primarily physical and structural rather than biochemical:
Why not just coconut oil? Coconut oil contains ~50% lauric acid, but lauric acid must be converted to monolaurin in the body, and the conversion rate is inefficient and variable. To achieve antimicrobial concentrations, you would need to consume impractical amounts of coconut oil. Supplemental monolaurin provides the active form directly at consistent therapeutic doses.
| Parameter | Recommendation |
|---|---|
| Product | Nutricost Monolaurin |
| Dose | 1,000 mg per day (2 capsules x 500 mg) |
| Timing | 2 capsules with dinner |
| With food | Yes — fat improves monoglyceride absorption |
| Cycling | Not required for maintenance; can increase to 3,000 mg/day during acute illness |
Herxheimer reaction: When monolaurin rapidly destroys large numbers of pathogens (especially in people with chronic viral loads like EBV), the sudden release of microbial debris can temporarily worsen symptoms (fatigue, headache, body aches). This is a die-off reaction, not a side effect. Start with 500 mg/day and titrate up over 1-2 weeks if this occurs.
| Study | Finding | PMID |
|---|---|---|
| Schlievert & Peterson, 2012 | Glycerol monolaurate (monolaurin) demonstrated broad-spectrum antimicrobial activity against gram-positive bacteria including MRSA, with additional anti-inflammatory properties by inhibiting superantigen-induced T-cell activation and cytokine production | 19825218 |
| Hilmarsson et al., 2005 | Monolaurin rapidly inactivated enveloped viruses (HSV-1, HSV-2, vesicular stomatitis virus) by dissolving the viral lipid envelope at concentrations achievable through oral supplementation. Non-enveloped viruses were resistant, confirming the lipid-dissolution mechanism | 17651080 |
| Lopes et al., 2012 | Monolaurin disrupted established biofilms of S. aureus and S. epidermidis in a dose-dependent manner, reducing biofilm biomass by up to 95% and restoring antibiotic susceptibility of biofilm-embedded bacteria | 23097596 |
A March 2025 prospective observational cohort study published in the International Journal of Molecular Sciences enrolled 2,712 Italian healthcare workers and followed them for six months. The study identified an optimal serum monolaurin cutoff of 0.45 µg/mL and found that higher serum monolaurin levels were associated with a reduced risk of COVID-19 infection. Separately, a 2025 nanoemulsion study demonstrated that monolaurin formulated as a nanoemulsion inhibited SARS-CoV-2 and influenza A (H1N1) viruses with >99.90% efficacy, significantly outperforming unformulated monolaurin. However, researchers note that peer-reviewed evidence for in vivo antimicrobial effects of oral monolaurin as a dietary supplement remains limited, highlighting the need for more rigorous human clinical trials.
These tests provide objective markers of immune function and systemic inflammation that can reflect monolaurin's antimicrobial impact.
Nutricost — Monolaurin, 1,000 mg, 240 Capsules (500 mg per capsule)
Price: $18.18
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