How does Maqui berry work as an antioxidant in the body?

Maqui berry functions through a high concentration of anthocyanins and delphinidins, which are potent flavonoid compounds. These constituents neutralize free radicals and reduce oxidative stress. With one of the highest ORAC (Oxygen Radical Absorbance Capacity) values of any fruit, its mechanism involves donating electrons to unstable molecules to prevent cellular damage. Additionally, preliminary evidence suggests these compounds may inhibit carbohydrate digestion enzymes, potentially moderating blood sugar spikes (Evidence Level C).

Does Maqui berry interact with blood thinners or diabetes medications?

Yes, caution is advised. Maqui berry may lower blood glucose levels, potentially enhancing the effects of diabetes medications and causing hypoglycemia (Evidence Level C). Furthermore, due to potential anti-platelet effects from its high flavonoid content, it may increase bleeding risk when combined with anticoagulant therapy like Warfarin. Patients on these medications should consult a healthcare provider before adding Maqui supplements to their regimen.

What is the recommended daily dosage for Maqui berry?

The standard recommended dosage for adults ranges from 500mg to 2 grams of dried berry powder daily. Alternatively, a standardized extract dosage of approximately 150mg is often suggested. The berry has a long history of use as a food source, but therapeutic doses are typically delivered via capsules or powders. It is generally recommended to take the supplement with food to enhance absorption.

Is Maqui berry safe to take during pregnancy?

Maqui berry is generally considered safe during pregnancy when consumed in amounts commonly found in foods. It has a history of use as a staple food among the Mapuche people without reported toxicity. However, concentrated medicinal supplements have not been rigorously tested in pregnant populations. As a precaution, pregnant women should consult a healthcare provider before using high-dose Maqui extracts.

What are the side effects of taking Maqui berry?

Maqui berry is well-tolerated by most individuals, with side effects being rare. The most common complaint is mild gastrointestinal upset in sensitive individuals. A unique but harmless side effect is temporary purple staining of the teeth or tongue due to the deep pigmentation of the anthocyanins. There are currently no serious adverse events reported in the available literature regarding standard consumption.

Maqui Berry (Aristotelia chilensis)

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Maqui berry (Aristotelia chilensis) is an endemic Chilean berry recognized for its high antioxidant and anti-inflammatory properties, primarily attributed to its rich polyphenol and anthocyanin content [PMID:38540828, PMID:41750585].

Background

Aristotelia chilensis, also known as Maqui, is a small dioecious tree in the Elaeocarpaceae family native to southern Chile [PMID:31673575, PMID:38540828].

Traditional uses

It has been used for generations by the indigenous Mapuche population to treat various disease conditions [PMID:38618933] and has been used as an astringent, tonic, and antidiarrhoeal [PMID:26778456].

Active compounds

The berry is rich in bioactive compounds, most notably anthocyanins (specifically delphinidin 3-O-β-glucoside, delphinidin 3,5-O-diglucoside, and delphinidin 3-O-sambubioside-5-O-glucoside), flavonoids, indole alkaloids (such as hobartine), coumarins, caffeic and ferulic acids, and tocopherols [PMID:38540828, PMID:25370110, PMID:39061913, PMID:31480627].

Mechanism of action

Maqui berry exerts effects through the down-regulation of iNOS and COX-2 protein expressions to suppress nitric oxide production [PMID:28040469], inhibition of the NLRP3 inflammasome and mast cell activation [PMID:38283356], and suppression of light-induced phosphorylation of p38 to inhibit ROS production [PMID:23561088]. It may also modulate the Nrf2 signaling pathway and improve mitochondrial function [PMID:41750585].

Clinical evidence

Evidence DMetabolic Syndrome/Obesity

Administration in rat models reduced weight gain, blood fasting glucose, total cholesterol, triacylglycerides, insulin resistance, and blood pressure [PMID:38132871]; in obese mice, it improved insulin response and decreased weight gain [PMID:31480627, PMID:3391941 la].

Evidence BOxidative Stress (Respiratory)

In an exploratory study of asymptomatic smokers, intake of maqui extract normalized H2O2 and IL-6 concentrations in exhaled breath condensate [PMID:25889552].

Evidence DCognitive Function

Aqueous extract (50-100 mg/kg) in rats exposed to ozone was effective in preventing oxidative stress and improving spatial learning and memory [PMID:31354109].

Evidence DColitis (Crohn's-like)

Anthocyanin-rich extract improved disease activity index and colon histoarchitecture while reducing NLRP3 inflammasome and mast cell activation in mice [PMID:38283356].

Evidence DNociceptive Pain

Maqui-berry powder demonstrated antinociceptive properties in mice during both neurogenic and inflammatory phases of the formalin test [PMID:33719824].

Safety & adverse effects

Water and ethanol extracts were found to be safe regarding toxic elements (arsenic, cadmium, lead) and did not cause cytotoxic effects on human skin fibroblasts [PMID:38067532]. No gastric damage was observed in mice following administration of maqui-berry powder [PMID:33719824].

Evidence summary

The current evidence is primarily based on in vitro studies and animal models (Level D), with very limited exploratory human data (Level B). Most studies highlight strong antioxidant and anti-inflammatory potential.

PubMed sources

1.PMID: 26400429 (2015) — Anti-inflammatory Diets. · Journal of the American College of Nutrition
2.PMID: 38540828 (2024) — A Review of the Functional Characteristics and Applications of Aristotelia chilensis (Maqui Berry), in the Food Industry. · Foods (Basel, Switzerland)
3.PMID: 38618933 (2024) — Physiologic effects of the maqui berry (Aristotelia chilensis): a focus on metabolic homeostasis. · Food & function
4.PMID: 38067532 (2023) — Antioxidant Properties of Maqui Berry Extract (Aristotelia chilensis (Mol.) Stuntz) and Its Potential Photoprotective Role on Human Skin Fibroblasts. · Molecules (Basel, Switzerland)
5.PMID: 36986757 (2023) — Anti-Inflammatory Chilean Endemic Plants.

Maqui Berry

Sources & Citations