Caprylic Acid

NutraPedia - Evidence-Based Supplement Research

Back to Table of Contents
Health Goals: digestion immunity skin

Research Overview

Across the provided abstracts, caprylic acid (octanoic acid, C8:0) is most studied in three applied areas: (1) metabolism/ketosis and neurodegenerative disease support via medium-chain triglycerides (MCTs) or caprylic triglyceride; (2) pharmaceutical and analytical applications, where caprylic acid is used as a functional excipient/processing aid (e.g., protein precipitation in LC‑MS/MS therapeutic antibody monitoring, and as a component of hydrophobic therapeutic deep eutectic solvents enabling self-emulsifying oral formulations); and (3) agricultural pest management, where caprylic acid contributes to oviposition deterrence in insect pests. A separate mechanistic nutrition/endocrinology line highlights caprylic acid as a substrate for ghrelin octanoylation, potentially linking dietary C8:0 to appetite regulation and complicating earlier narratives about medium-chain fats and weight loss.

The strongest evidence in these abstracts supports caprylic acid’s utility as a practical tool or ingredient rather than as a proven standalone therapy: caprylic acid precipitation appears to enable robust, precise, high-throughput LC‑MS/MS quantification of multiple therapeutic antibodies in serum; caprylic-acid–based eutectic systems can improve formulation feasibility for poorly soluble drugs (e.g., cannabidiol) and show in vitro stability/protection and permeability signals; and caprylic acid (especially combined with capric acid) shows reproducible oviposition deterrence against spotted-wing drosophila in laboratory assays with supportive field evidence. For human metabolic effects, the evidence base summarized here is more consistent for the ability of C8-containing MCTs to induce ketosis in healthy adults (with dose/meal-context effects and gastrointestinal tolerability constraints) than for disease modification. In ALS, caprylic triglyceride improved motor performance and mitochondrial respiration in a transgenic mouse model but did not clearly extend survival, indicating functional benefit in animals without definitive evidence of altered disease course.

Key gaps include the need for well-powered, controlled human clinical trials testing caprylic acid/MCT interventions on clinically meaningful endpoints in neurodegenerative diseases (beyond ketone elevation), including long-term safety and tolerability. Mechanistically, more work is needed to reconcile metabolic benefits of MCTs with the endocrine pathway in which dietary C8:0 may promote ghrelin octanoylation and appetite stimulation, including dose–response relationships, inter-individual variability, and net effects on body weight and energy balance. For drug delivery and analytical uses, broader validation across compounds, matrices, and real-world clinical workflows (including standardization and inter-laboratory comparability) would strengthen translation, while agricultural applications would benefit from expanded field trials, optimization of formulations/doses, assessment of non-target and ecological effects, and integration into pest-management programs to reduce reliance on conventional insecticides.

1. What conditions has Caprylic Acid been studied for?

  • Amyotrophic lateral sclerosis (ALS) (preclinical): caprylic triglyceride (a medium-chain triglyceride that yields ketone bodies; closely related to caprylic acid/C8 metabolism) was tested in SOD1-G93A ALS mice.

  • Ketosis induction / metabolic support (human-focused review): octanoic acid (caprylic acid, C8) as part of MCT supplementation to raise ketone bodies in healthy adults, with implications discussed for neurodegenerative disease contexts (e.g., Alzheimer’s) but the reviewed evidence base described is in healthy adults.

  • Appetite/ghrelin biology (mechanistic physiology): caprylic acid as a substrate involved in ghrelin octanoylation (via GOAT), potentially influencing appetite regulation.

  • Drug/biologic manufacturing and analytics (non-supplement clinical utility): caprylic acid precipitation used in LC-MS/MS therapeutic antibody quantification workflows; caprylic acid fractionation used to produce equine whole-IgG antivenom.

  • Snakebite envenoming (taipan) (preclinical antivenom evaluation): antivenom produced using caprylic acid fractionation was assessed for neutralizing venom effects.

  • Insect deterrence (agricultural): caprylic acid (especially combined with capric acid) reduced spotted-wing drosophila oviposition.

  • Pharmaceutical formulation/drug delivery: caprylic acid used to create a hydrophobic deep eutectic solvent with cannabidiol (CBD) for oral self-emulsifying delivery; evaluated for stability, gastric protection, and in vitro permeability/safety.

  • Wound-related products (composition study): caprylic acid appears as a component of a reference wound-treatment product; the cited study primarily compared fatty-acid compositions of oils rather than testing clinical wound outcomes.

2. Does it work in treating those conditions? Summarize the evidence.

  • ALS (mouse model): partial supportive evidence. In SOD1-G93A mice, caprylic triglyceride treatment attenuated progression of weakness and protected against spinal cord motor neuron loss, and it increased mitochondrial oxygen consumption rate in vivo. However, there was no significant survival benefit reported in these animals. This is promising but remains preclinical and does not establish efficacy in humans.

  • Ketosis induction (healthy adults): evidence supports a ketogenic effect, not disease treatment. The review concludes MCTs (including C8) can induce ketosis and provides practical dosing/timing strategies (e.g., starting at 5 g and titrating to ~15–20 g C8) to optimize ketone generation and reduce GI side effects. This supports raising ketones as an effect, but it is not direct evidence that caprylic acid treats neurodegenerative diseases.

  • Appetite modulation via ghrelin: mechanistic, not clinical proof. The review notes caprylic acid can provide substrate for ghrelin octanoylation and highlights a potential discrepancy: MCTs have been associated with weight-loss effects historically, yet C8 may also be linked to appetite stimulation through ghrelin activation. This is hypothesis/mechanism-oriented and calls for further studies.

  • Snakebite (antivenom produced using caprylic acid fractionation): evidence supports antivenom potency, not caprylic acid as a therapy. The whole-IgG antivenom produced via caprylic acid fractionation effectively neutralized several venom activities and had similar potency to a comparator antivenom for lethal neurotoxicity, myotoxicity, and phospholipase A(2) activity; it showed higher potency for neutralizing coagulant activity (abstract text is truncated but indicates higher potency). Caprylic acid here is a manufacturing step, not the active treatment.

  • CBD oral delivery: evidence supports formulation performance in vitro. Caprylic acid enabled a CBD-based deep eutectic solvent compatible with SEDDS, showing nano-droplet formation, stress-test stability, protection of CBD at pH 1.2 for up to 2 hours, and in vitro safety and Caco-2 permeability. This supports a drug-delivery approach, not a direct therapeutic effect of caprylic acid itself.

  • Other items (insect deterrence, analytical methods, surfactant effects): these demonstrate functional uses of caprylic acid in agriculture and biopharma workflows, not treatment of human conditions.

3. What health benefits does it have?

  • Rapid energy substrate / ketosis support (via MCT/C8): The MCT review describes C8 (caprylic acid) as a practical way to induce ketosis without a full ketogenic diet, with recommendations to optimize ketone response (e.g., titration to ~15–20 g C8, timing after an overnight fast, possible small added effect of caffeine, and emulsification to improve tolerability/effect).

  • Potential neuro-metabolic support (preclinical): In ALS mice, caprylic triglyceride improved functional performance and motor neuron preservation and increased mitochondrial oxygen consumption, consistent with a benefit on energy metabolism during disease progression (but not survival).

  • Potential physiological signaling role via ghrelin acylation: Caprylic acid is highlighted as uniquely involved in the octanoylation of ghrelin (via GOAT), implying it may influence processes regulated by active (octanoylated) ghrelin (e.g., appetite-related pathways). The abstract frames this as an “emerging” role and emphasizes uncertainty.

  • Clinical/biomedical utility (indirect health relevance): Caprylic acid precipitation/fractionation is used to simplify and lower costs in antibody measurement workflows and in producing antivenom; these are important healthcare applications, though not “supplement benefits.”

4. Does it have any downsides or side effects?

  • Gastrointestinal side effects (MCT/C8 supplementation): The MCT review notes unwanted effects are primarily GI discomfort and diarrhea, and recommends starting low (e.g., 5 g) and titrating upward, plus considering emulsification to reduce side effects.

  • Possible appetite stimulation (mechanistic concern): The caprylic acid review highlights a potential downside: C8 may support ghrelin octanoylation, which could stimulate appetite, potentially conflicting with goals like weight loss. This is presented as a discrepancy requiring more research, not a confirmed clinical adverse effect.

  • Formulation/biologic stability issues (non-oral supplement context): In a monoclonal antibody stability study, caprylic acid (used as an anionic surfactant) had a slightly negative effect on mechanical and photostability compared with non-ionic surfactants or no surfactant. This is relevant to pharmaceutical formulation rather than dietary use.

  • Evidence limitations: Several findings are preclinical (ALS mouse model) or in vitro/formulation (CBD SEDDS, antibody stability), so human side-effect profiles for caprylic acid specifically (beyond MCT-related GI effects) are not established by these abstracts.

5. Is it beneficial or harmful for any genetic variations (pharmacogenomics)?

The provided abstracts do not report pharmacogenomic analyses or genotype-specific responses to caprylic acid (or caprylic triglyceride/MCT C8). In particular:

  • No human genetic subgroup data are described for ketosis response, GI tolerability, appetite effects, or neurological outcomes.

  • The ALS evidence is in a transgenic mouse model (SOD1-G93A), which is a disease model rather than a human pharmacogenomic finding; it does not establish that people with specific ALS genotypes benefit.

Conclusion: based on these abstracts, there is insufficient evidence to claim caprylic acid is beneficial or harmful for specific genetic variants in humans.

References

  1. Effect of the probiotic strain, Lactiplantibacillus plantarum P9, on chronic constipation: A randomized, double-blind, placebo-controlled study.
    Teng Ma, Ni Yang, Yong Xie, Yingmeng Li, Qiuping Xiao, Qiong Li, Hao Jin, Longjin Zheng, Zhihong Sun, Kexuan Zuo, Lai-Yu Kwok, Heping Zhang, Nonghua Lu, Wenjun Liu (2023) - Pharmacological research
  2. High-throughput, low-cost quantification of 11 therapeutic antibodies using caprylic acid precipitation and LC-MS/MS.
    Erik I Hallin, Trond Trætteberg Serkland, Tormod K Bjånes, Silje Skrede (2024) - Analytica chimica acta
  3. Harnessing therapeutic deep eutectic solvents in self-emulsifying systems to improve CBD delivery.
    Gennaro Balenzano, Giuseppe Francesco Racaniello, Antonio Spennacchio, Antonio Lopalco, Rosa Maria Iacobazzi, Angela Assunta Lopedota, Valentino Laquintana, Nunzio Denora (2024) - International journal of pharmaceutics
  4. Caprylic triglyceride as a novel therapeutic approach to effectively improve the performance and attenuate the symptoms due to the motor neuron loss in ALS disease.
    Wei Zhao, Merina Varghese, Prashant Vempati, Anastasiya Dzhun, Alice Cheng, Jun Wang, Dale Lange, Amanda Bilski, Irene Faravelli, Giulio Maria Pasinetti (2012) - PloS one
  5. The Ketogenic Effect of Medium-Chain Triacylglycerides.
    Ting-Yu Lin, Hung-Wen Liu, Tsung-Min Hung (2021) - Frontiers in nutrition
  6. A 2-component blend of coconut oil-derived fatty acids as an oviposition deterrent against Drosophila suzukii (Drosophilidae: Diptera).
    Gwang Hyun Roh, Linnea Meier, Binita Shrestha, Stephen P Hesler, Junwei J Zhu, Paul E Kendra, Gregory M Loeb, Jia-Wei Tay, Dong H Cha (2023) - Journal of economic entomology
  7. Revisiting the metabolism and physiological functions of caprylic acid (C8:0) with special focus on ghrelin octanoylation.
    Fanny Lemarié, Erwan Beauchamp, Philippe Legrand, Vincent Rioux (2016) - Biochimie
  8. Effect of Surfactants on Mechanical, Thermal, and Photostability of a Monoclonal Antibody.
    Meera Agarkhed, Courtney O'Dell, Ming-Ching Hsieh, Jingming Zhang, Joel Goldstein, Arvind Srivastava (2018) - AAPS PharmSciTech
  9. The Fatty Acid Composition of Vegetable Oils and Their Potential Use in Wound Care.
    Anselmo Queiroz Alves, Valdemiro Amaro da Silva, Alexandre José Silva Góes, Mariza Severina Silva, Gibson Gomes de Oliveira, Isla Vanessa Gomes Alves Bastos, Antonio Gomes de Castro Neto, Antonio José Alves (2019) - Advances in skin & wound care
  10. Preclinical evaluation of caprylic acid-fractionated IgG antivenom for the treatment of Taipan (Oxyuranus scutellatus) envenoming in Papua New Guinea.
    Mariángela Vargas, Alvaro Segura, María Herrera, Mauren Villalta, Ricardo Estrada, Maykel Cerdas, Owen Paiva, Teatulohi Matainaho, Simon D Jensen, Kenneth D Winkel, Guillermo León, José María Gutiérrez, David J Williams (2011) - PLoS neglected tropical diseases
  11. Impact of NSLAB on Kazakh cheese flavor.
    Shan Li, Yandie Li, Zixuan Du, Baokun Li, Yue Liu, Yunyun Gao, Yan Zhang, Kaili Zhang, Qingling Wang, Shiling Lu, Juan Dong, Hua Ji, Yuhui Li (2021) - Food research international (Ottawa, Ont.)
  12. Simple and efficient protocol for immunoglobulin Y purification from chicken egg yolk.
    Elrashdy M Redwan, Abdullah A Aljadawi, Vladimir N Uversky (2021) - Poultry science
  13. Effect of chitosan-carvacrol coating on the quality of Pacific white shrimp during iced storage as affected by caprylic acid.
    Qianyun Wang, Jun Lei, Junjie Ma, Gaofeng Yuan, Haiyan Sun (2018) - International journal of biological macromolecules
  14. Development of poly(lactic acid)-based natural antimicrobial film incorporated with caprylic acid against Salmonella biofilm contamination in the meat industry.
    Eun Her, Sangha Han, Sang-Do Ha (2024) - International journal of food microbiology
  15. Supplementation of Regular Diet With Medium-Chain Triglycerides for Procognitive Effects: A Narrative Review.
    Ksenia Shcherbakova, Alexander Schwarz, Sergey Apryatin, Marina Karpenko, Alexander Trofimov (2022) - Frontiers in nutrition
  16. Study and Computational Modeling of Fatty Acid Effects on Drug Solubility in Lipid-Based Systems.
    Nicole Wyttenbach, Andreas Niederquell, Philipp Ectors, Martin Kuentz (2022) - Journal of pharmaceutical sciences
  17. Caprylic (Octanoic) Acid as a Potential Fatty Acid Chemotherapeutic for Glioblastoma.
    Meric A Altinoz, Aysel Ozpinar, Thomas N Seyfried (2020) - Prostaglandins, leukotrienes, and essential fatty acids
  18. Combined antimicrobial effect of oregano essential oil and caprylic acid in minced beef.
    Radka Hulankova, Gabriela Borilova, Iva Steinhauserova (2013) - Meat science
  19. Effect of caprylic acid alone or in combination with peracetic acid against multidrug-resistant Salmonella Heidelberg on chicken drumsticks in a soft scalding temperature-time setup.
    Shijinaraj Manjankattil, Divek V T Nair, Claire Peichel, Sally Noll, Timothy J Johnson, Ryan B Cox, Annie M Donoghue, Anup Kollanoor Johny (2021) - Poultry science
  20. New decontamination method based on caprylic acid in combination with citric acid or vanillin for eliminating Cronobacter sakazakii and Salmonella enterica serovar Typhimurium in reconstituted infant formula.
    M J Choi, S A Kim, N Y Lee, M S Rhee (2013) - International journal of food microbiology


Want personalized supplement recommendations based on your genetics?
Upload Whole Genome Sequencing (WGS) raw DNA data today!
Or upload raw DNA data to get started with your free analysis!