Yerba Mate (Ilex paraguariensis)

What is it?

Yerba mate is a traditional South American beverage made from the dried leaves of the Ilex paraguariensis plant. It is consumed primarily in Argentina, Brazil, Paraguay, and Uruguay, where it is enjoyed for its stimulating effects and numerous health benefits.

How does it work for medicinal purposes?

Yerba mate contains several bioactive compounds, including caffeine, theobromine, and various antioxidants such as polyphenols and saponins. These compounds work together to provide a range of health benefits, including boosting metabolism, enhancing mental clarity, and supporting cardiovascular health. The caffeine content also contributes to appetite suppression and increased energy expenditure.

What are the active ingredients that are important for its medicinal properties?

The primary active ingredients in yerba mate include:

• Caffeine: Stimulates the central nervous system, increases energy levels, and boosts metabolism.
• Theobromine: Provides a mild stimulant effect and supports cardiovascular health.
• Polyphenols: Powerful antioxidants that reduce inflammation and protect against chronic diseases.
• Saponins: Have anti-inflammatory properties and support immune function.

What forms does it come in?

• Loose leaves
• Tea bags
• Extracts (liquid or powder)
• Capsules or tablets
• Bottled beverages

What if I have an imbalance or deficiency?

Yerba mate can help address energy deficiencies and support overall vitality. It is not typically used to correct specific nutrient imbalances but can complement a healthy diet to improve general well-being.

When was it first used for medicinal purposes?

Yerba mate has been used for centuries by indigenous peoples of South America, such as the Guarani and Tupi tribes, for its medicinal properties and as a social beverage. Its use was later adopted by Spanish colonists and spread throughout the region.

What does Yerba Mate (Ilex paraguariensis) help with?

Yerba mate is a tea made from the dried leaves of a South American holly tree. People often drink it from a gourd through a metal straw. Like coffee, it holds caffeine, so it wakes you up.

• Losing body fat
  Early evidence — small clinical studies in people, with mixed results. In clinical studies, mate raised fat burning and lowered body fat. The effect showed up most clearly when people also exercised. Mate may curb hunger a little as well.
  Evidence grade C · Traditional tier T2
• Exercise and staying power
  Early evidence — human studies of mate taken before exercise. In research, people who drank mate before exercise burned a larger share of fat while moving. Burning more fat can spare muscle glycogen, the body's stored fuel. That may let a workout run longer.
  Evidence grade C · Traditional tier T2
• Eating less at meals
  Early evidence — small human studies of mate taken before eating. Studies found that mate slowed the rate at which food left the stomach. People who drank it before a meal ate less. Mate also has a mild warming effect, so the body burns slightly more calories at rest.
  Evidence grade C · Traditional tier T2
• High cholesterol
  Early evidence — several human studies of regular mate drinking. Several studies found that regular mate drinking lowered LDL, the "bad" cholesterol, and triglycerides, a blood fat. HDL, the "good" kind, rose a little in some of that work. Lab studies point to saponins and polyphenols, plant compounds that act on how fat is taken up.
  Evidence grade C · Traditional tier T2
• Blood sugar that runs high
  Early evidence — lab work plus human intake studies, not large trials. Mate holds chlorogenic acids, which are well studied plant acids. In these studies they slowed how fast sugar entered the blood and improved the response to insulin. Regular mate drinking has been linked with lower fasting blood sugar.
  Evidence grade C · Traditional tier T2
• Trouble focusing, and low energy
  Long traditional use · not yet tested in trials — mainly user reports; direct trials on mate are thin. Mate holds three stimulants: caffeine, theobromine and theophylline. Users say the lift is smooth and lasts, with no sharp crash and less jitter than strong coffee. Direct trials on mate, focus and tiredness are lacking, so this rests mostly on what drinkers report.
  Evidence grade D · Traditional tier T2
• Body-wide inflammation
  Long traditional use · not yet tested in trials — links from intake studies, not randomised trials. Mate holds polyphenols such as quercetin, rutin and chlorogenic acids. Regular intake has been linked with lower blood markers of inflammation. Those are lab numbers, not proof that symptoms ease.
  Evidence grade D · Traditional tier T2
• Low mood and low drive
  Long traditional use · not yet tested in trials — a mechanism idea plus user reports; no mood trial on file. Caffeine and theobromine act on dopamine, a brain signal tied to drive. Regular drinkers often describe a gentle lift in mood and motivation. No human mood trial on mate is held here.
  Evidence grade insufficient · Traditional tier T2
• Slow, sluggish digestion
  Long traditional use · not yet tested in trials — tradition and lab work only. Mate has long been taken after meals as a digestive aid. Its bitter compounds and saponins appear to support bile flow and gut movement in lab work. Drinkers report less bloating, but no human trial backs that.
  Evidence grade insufficient · Traditional tier T2

What Yerba Mate (Ilex paraguariensis) has not been shown to do

• Mate is not an antidepressant, and no trial on file shows it helps clinical depression.
• It has not been shown in any human trial to ease bloating or wake up slow digestion; that use rests on tradition.
• It has not been shown to treat diabetes or to stand in for blood sugar medicine.
• It has not been shown to ease sore joints or heart disease; the inflammation work measured blood markers only.
• It has not been shown to shed body fat on its own; the clearest results came when people exercised too.
• It has not been shown in trials to be gentler on anxiety than coffee; that idea comes from user reports.

How to read this:

Each use above has its own grade. A means steady randomised trials in people. B means at least one good trial. C means small, mixed or early human work. D means the human evidence is weak or clashes. "Insufficient" means no human study at all, just lab work, animal work or long use. Yerba mate's overall grade on file is C. This page sets out options and what studies found. It is not medical advice, and it is not a promise of results. Talk with your own clinician before you add mate, above all if you take medicine or are pregnant.

What can Yerba Mate (Ilex paraguariensis) help prevent?

• Cardiovascular disease risk reduction (through LDL cholesterol lowering and antioxidant activity)
• Type 2 diabetes progression (through improved insulin sensitivity and blood sugar regulation)
• Obesity-related metabolic dysfunction (through fat oxidation support and appetite regulation)

Which foods are rich in it?

Yerba mate itself is consumed as a beverage. It is not typically found in foods but can be incorporated into various drinks and culinary applications such as:

• Teas
• Smoothies
• Infused water
• Herbal blends

What are possible side effects?

Yerba mate is generally safe for most people when used appropriately, but potential side effects include:

• Common (10-30%): Mild gastrointestinal issues (e.g., stomach discomfort, nausea); Insomnia or jitteriness, especially in individuals sensitive to caffeine
• Less Common (1-10%): Headache; Increased heart rate
• Rare (<1%): Increased risk of certain cancers (e.g., esophageal cancer) with long-term, high consumption due to the presence of polycyclic aromatic hydrocarbons (PAHs) when the leaves are smoked during processing

What’s the recommended daily dose?

The recommended daily dose of yerba mate varies depending on the form and individual health needs, but common dosages are:

• Tea: 1-3 cups of yerba mate tea daily.
• Capsules or tablets: 500-1,000 mg of yerba mate extract taken 1-2 times daily.

How many days does it take to work?

Some benefits of yerba mate, such as increased energy and mental clarity, can be noticeable within a few hours of consumption. Long-term benefits, such as improved cardiovascular health and weight management, may take several weeks to months of consistent use to become apparent.

What time of day is best to take it?

Yerba mate can be taken at any time of day. For an energy boost and mental clarity, it is often consumed in the morning or early afternoon. Avoid taking it too close to bedtime to prevent sleep disturbances due to its caffeine content.

Is it best to take it with or without food?

Yerba mate can be taken with or without food. Drinking it with meals may help improve its digestive benefits and reduce any potential gastrointestinal discomfort.