Matairesinol – Lignan, Benefits & Food Sources
Matairesinol is a plant-derived lignan found in flaxseeds, sesame, and whole grains that is converted by gut bacteria into health-promoting enterolignans.
Things worth knowing about "Matairesinol"
Matairesinol is a plant-derived lignan found in flaxseeds, sesame, and whole grains that is converted by gut bacteria into health-promoting enterolignans.
What is Matairesinol?
Matairesinol is a naturally occurring lignan – a group of secondary plant compounds (phytochemicals) with a polyphenolic structure. It belongs to the class of phytoestrogens, meaning plant-based compounds that can exert effects similar to, but considerably weaker than, the female hormone estrogen in the human body. Matairesinol is found in numerous plant foods and, after ingestion, is converted by gut bacteria into the biologically active enterolignans enterolactone and enterodiol.
Dietary Sources
Matairesinol is present in a wide variety of plant-based foods. Particularly rich sources include:
- Flaxseeds (one of the richest lignan sources overall)
- Sesame seeds
- Whole grains (e.g., rye, wheat, oats)
- Legumes (e.g., lentils, beans)
- Certain vegetables (e.g., broccoli, garlic)
- Berries and other fruits
- Coffee (particularly in green, unroasted coffee beans)
The concentration of matairesinol varies considerably depending on the food type, growing conditions, and degree of processing.
Mechanism of Action
After dietary intake, matairesinol is metabolized in the gut by specific intestinal bacteria (e.g., Clostridium scindens and related species), primarily producing enterolactone, a secondary metabolite that is detectable in the bloodstream and is considered responsible for many of the observed biological effects.
Matairesinol and its metabolites act through several mechanisms:
- Estrogen receptor binding: Weak binding to estrogen receptors (ER-α and ER-β), enabling both estrogenic and anti-estrogenic effects.
- Antioxidant activity: Neutralization of free radicals and protection of cells from oxidative stress.
- Anti-inflammatory properties: Inhibition of pro-inflammatory signaling pathways.
- Modulation of hormone metabolism: Influence on estrogen production and breakdown in the body.
Potential Health Benefits
Hormone-Related Cancers
Epidemiological studies suggest that higher intake of lignans such as matairesinol may be associated with a reduced risk of hormone-dependent cancers, particularly breast cancer, prostate cancer, and colorectal cancer. The precise mechanisms and clinical relevance are still being investigated.
Cardiovascular Health
Laboratory studies and some observational studies suggest that matairesinol and its metabolites may contribute to lowering LDL cholesterol, inhibiting platelet aggregation, and improving vascular function.
Menopausal Symptoms
Due to its weak estrogenic activity, matairesinol is discussed as a potential natural support for menopausal symptoms such as hot flashes. Scientific evidence supporting this use remains limited at present.
Bone Health
Phytoestrogens such as matairesinol could theoretically exert a protective effect on bone density, since estrogens play an important role in bone metabolism. However, robust clinical data are still lacking.
Recommended Intake and Supplementation
No officially established daily intake recommendations for matairesinol exist from the WHO or the European Food Safety Authority (EFSA). Typical dietary intake through a lignan-rich diet ranges from a few micrograms to several milligrams per day, depending on dietary habits. Matairesinol is also available as a dietary supplement, often in combination with other lignans.
Safety and Interactions
Matairesinol is considered safe when consumed through natural food sources. However, with high-dose supplements, certain considerations apply:
- Due to its weak estrogen-like activity, individuals with estrogen-sensitive conditions (e.g., certain forms of breast cancer) should seek medical advice before taking supplements.
- Potential interactions with hormone therapies or tamoxifen-based medications cannot be excluded.
- The individual conversion of matairesinol into enterolactone in the gut is strongly influenced by the gut microbiome and can vary considerably from person to person.
References
- Milder, I. E. J. et al. – Lignan contents of Dutch plant foods: a database including lariciresinol, pinoresinol, secoisolariciresinol and matairesinol. British Journal of Nutrition, 93(3), 393–402 (2005). PubMed.
- Adlercreutz, H. – Lignans and human health. Critical Reviews in Clinical Laboratory Sciences, 44(5–6), 483–525 (2007). PubMed.
- European Food Safety Authority (EFSA) – Scientific Opinion on the safety of Matairesinol as a Novel Food ingredient. EFSA Journal, 10(10):2929 (2012).
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