Educational information, not medical advice — ask your doctor or midwife.
Maqui is a small, dark purple berry from southern Chile and Argentina. It grows on a shrub called Aristotelia chilensis. People eat the fruit as food and also take it as a powder or capsule.
The berry is very rich in anthocyanins (the deep purple plant pigments). Sellers market it for eye comfort, blood sugar and "antioxidant support". Most of that marketing runs well ahead of the proof.
The honest verdict: human testing is small, short and early. A few little trials hint at mild effects on dry eye and on blood sugar after a meal.
Long use by the Mapuche people is not proof that maqui works. It is not proof that it is safe either. If you take antiplatelet drugs (medicines that stop blood clots forming), read the safety notes below.
No one has shown in people exactly how maqui acts. The proposed mechanism rests mostly on lab and animal work.
Maqui is loaded with anthocyanins, above all a group called delphinidin glycosides. In test tubes these pigments mop up free radicals (unstable molecules that can damage cells). Whether eating them does the same thing inside your body is not settled.
In cell and animal studies, delphinidin appears to slow enzymes that break starch and sugar into glucose. It also appears to slow the carrier that pulls sugar from the gut into the blood. That would blunt the sugar spike after a meal.
A few small human trials do point that way. In them, maqui extract lowered the rise in blood sugar and insulin after a carbohydrate meal. The groups were small and the effect was modest.
For dry eye, the idea is that maqui pigments support tear production in the tear glands. That was first seen in animal work. Small human trials in Japan reported more tear fluid and less eye discomfort.
In lab studies maqui extracts also calm markers of inflammation. That has not been shown to translate into relief from any disease in people.
You will find maqui in several forms.
Food-like forms:
- Fresh or frozen berries, mostly in Chile and Argentina. - Freeze-dried fruit powder, sold loose or in capsules. - Juice and juice blends, often sweetened with other fruit.
Stronger and traditional forms:
- Standardised extracts stated in milligrams of delphinidin glycosides. These are the ones used in the eye studies. - Jam, syrup, and a traditional fermented drink.
Powder and juice are food-like and mild. Standardised extracts are far more concentrated per gram.
Labels vary widely in strength and purity. A "maqui blend" may hold very little actual maqui.
Maqui has deep standing with the Mapuche people of southern Chile, going back centuries before European contact. The berry was eaten fresh, dried for winter, and fermented into a drink.
Traditional healers used leaf and bark preparations for sore throat, mouth sores, wounds and loose stools. Stories describe warriors drinking maqui preparations for stamina before battle.
Spanish chroniclers recorded the plant from the colonial era onward. Maqui reached world supplement markets in the 2000s, sold as a "superfruit".
Stop and see a doctor if you get a rash, itching or swelling after taking it.
Get emergency help for trouble breathing or swelling of the face, lips or tongue.
See your doctor promptly if you have diabetes and notice shaking, sweating, confusion or unusual hunger, which can mean low blood sugar.
Book an appointment if dry eye lasts more than a few weeks, if your vision changes, or if your eye hurts. Those need a proper eye exam, not a berry supplement.
In the United States maqui is sold as an ordinary food and as a dietary supplement. It is not approved to treat or prevent any disease. In the UK and the EU it is sold as a food and in supplements, with rules that vary by product and claim.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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