Yerba mate (Ilex paraguariensis) is an herb prepared as a traditional drink common in South American countries. It can be served with or without sweetener, either hot or iced, and with fruit juice or milk.
Yerba mate contains minerals, caffeine, antioxidants, and other nutrients that may offer health benefits. Traditionally, yerba mate has been used to help reduce mental and physical fatigue. More recently, yerba mate has been used to increase urination, treat headaches, and promote weight loss. However, scientific evidence is lacking. Some studies suggest that yerba mate may reduce blood sugar levels in people who have type 2 diabetes.
Some studies suggest that drinking large amounts of yerba mate may increase the risk of some cancers, including oral, renal, and bladder. Also, the caffeine content of yerba mate may cause interactions with various prescription medications or herbal products.
2,5-Xylenol, 3,4-dicaffeoylquinic acid, 3,5-dicaffeoylquinic acid, 4,5-dicaffeoylquinic acid, 4-oxolauric acid, 5-O-caffeoylquinic acid, acetylated megastigmane glycosides, affinoside 1, aluminum, Aquifoliaceae (family), arbre à maté (French), arbutin, ash, beta-amyrin, Brazilian tea, butyric acid, buxifolioside I, buxifolioside II, caffeic acid, caffeine, caffeoyl derivatives, caffeoyl glucose, caffeoyl-feruloylquinic acids, caffeoyl-p-coumaroylquinic acids, caffeoylquinic acids, caffeoylshikimates, caffeoyl-sinapoylquinic acids, calcium, caminú, Cassine gogonha Raben., Cassine gouguba Guib., cha mate, chimarrão, chloride, chlorogenic acid, chlorophyll, choline, Chomelia amara Vell., cocido (Spanish), congonha, copper, Cruz de Malta™, cup herb, diferuloyl quinic acids, dicaffeoyl-feruloylquinic acid, dicaffeoylquinic acids, dicaffeoylshikimates, erva mate (Portuguese - Brazil), erva-verdadeira, erveira, fat, fatty acid methylesters, fatty acids, feruloylquinic acids, feruloylshikimatesaponins, fiber, flavonoids, green mate, herbal mate, hervea, hot mate with bombilla, hydroxycinnamoylshikimate esters, ilex, inositol, isobutyric acid, isocapronic acid, isovaleric acid, Ilex affinis, Ilex aquifolium L., Ilex argentina, Ilex brasiliensis, Ilex brevicuspis, Ilex buxifolia, Ilex domestica, Ilex dumosa var. dumosa, Ilex dumosa var. guaranina, Ilex integerrima, Ilex mate, Ilex mate St.-Hil., Ilex microdonta, Ilex paraguaiensis St. Hilaire, Ilex paraguariensis A.St.-Hil., Ilex paraguariensis extract, Ilex paraguariensis St-Hil., Ilex paraguariensis var. paraguariensis, Ilex paraguayensis, Ilex paraguayensis St.-Hil., Ilex pseudobuxus, Ilex sorbilis, Ilex taubertiana, Ilex theezans, inositol, ionone, iron, isobutyric acid, isocapronic acid, isovaleric acid, Jesuit's brazil tea, Jesuit's tea, ka'a (Guarani), kaempferol, kali chaye, kkiro, magnesium, manganese, mate, mate candy, mate chimarra, mate cocido (Spanish), mate con bombilla (Spanish), mate extract, mate folium, mate green fruit, mate leaves, mate powder, mate tea leaves, Matebaum (German), matee, mateglycosides, matenosides, matesaponins, mate-tea, mate-tea tree, Matéteestrauch (German), Matte Leão™, melanoidins, minerals, neo-chlorogenic acid, nicotinic acid, nitrogen, oleanolic acid, palmitic acid, pantothenic acid, Paraguay cayi, Paraguay herb, Paraguay tea, p-coumaroylquinic acids, phosphorus, phytol, phytosterols, polycyclic aromatic hydrocarbons, polyphenol, potassium, protein, pyridoxine, pyrrole alkaloid, quercetin, quinic acid, resin, resinic acid, riboflavin, rutin, sapogenin, saponins, saturated hydrocarbons, silicon, sodium, South American holly, squalene, St. Bartholemeow's tea, stearic acid, sulfur, tannic acid, tannin, terere, terrerre (Guarani), theobromine, theophylline, toasted mate tea, tricaffeoylquinic acid, tricaffeoylshikimate, trigonelline, triterpene oligoglycosides, ursolic acid, vanillin, vitamin E, xanthines, yerba leaves, yerba mate beverage, yerba matte, yerba-mate, yerva de palos (Spanish), yerva mate (Spanish), zinc.
Combination products: Metabolife® Ephedra Free (caffeine, green tea, garcinia, cambogia, yerba mate); YGD (yerba mate, guarana, damiana).
Note: This monograph focuses on yerba mate. Yerba mate contains caffeine. Thus there may be theoretical uses, safety issues, adverse effects, interactions, and mechanisms of action associated with caffeine that are not specifically addressed in this monograph. For a more complete overview of yerba mate, information on caffeine is available in the Natural Standard caffeine monograph.
These uses have been tested in humans or animals. Safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider.
Preliminary research suggests that yerba mate tea may benefit people who have type 2 diabetes. More research is needed before conclusions can be drawn.
Lipid lowering effects
Preliminary evidence suggests that yerba mate reduces lipids in people treated with statin therapy. More research is required before conclusions can be drawn.
In preliminary research, yerba mate had a lack of effect on mood and performance. Further research is required before conclusions can be drawn.
Yerba mate, as a source of caffeine, has traditionally been used for weight loss. Preliminary research has investigated this use of yerba mate. However, there is a lack of evidence for the effects of yerba mate alone on weight loss at this time.