Cognition/Weight/Heart

Yerba mate

Traditional South American tea providing caffeine and polyphenols for alertness, with modest evidence for weight and cholesterol support in adults.

Yerba mate

Traditional South American tea providing caffeine and polyphenols for alertness, with modest evidence for weight and cholesterol support in adults.

score

evidence

Caution

risk

Proven Benefits

01Increases alertness and focus

02May support body composition

03May lower LDL cholesterol

04May improve cognitive processing

05May increase satiety

06May improve vascular function

Chemical Forms

Recommended

Loose leaf infusion
Tea bags
Standardized leaf extract

Avoid

Smoked yerba mate (higher PAH content)
Very hot infusions (>65°C / 149°F) — linked to esophageal cancer risk

Expert Note

Traditional air-dried or unsmoked yerba mate contains fewer polycyclic aromatic hydrocarbons (PAHs) than smoked varieties. Steeping at moderate temperatures avoids the mechanical esophageal damage and carcinogenic risk associated with very hot beverages. Standardized extracts provide consistent polyphenol dosing but lack the food matrix of whole leaf.

Protocol

Amount

1–3 g

Frequency

Once to twice daily

When

Morning or early afternoon; avoid within 6 hours of bedtime due to caffeine content. Can be taken with or without food, though traditionally consumed between meals.

Condition-Based Dosing

Using dried leaf infusion

1–3 g steeped in hot (not boiling) water, 1–2 cups daily— Traditional consumption often exceeds this; supplemental trials use lower doses.

Using standardized extract for body composition

300–500 mg daily of extract standardized to polyphenols— Often studied alongside mild calorie restriction.

Using for LDL cholesterol support

3 g dried leaf daily, divided into 2 doses— Trials typically run 8–12 weeks before lipid panels shift.

Safety & Limits

Upper Safe Limit

No established UL; avoid exceeding ~400 mg total caffeine daily from all sources (EFSA guideline) when consuming yerba mate.

Cycling

Safe for continuous use

Contraindications

Pregnancy or breastfeeding — high caffeine content and insufficient safety data

Anxiety disorders or insomnia — caffeine may worsen symptoms

Arrhythmias or uncontrolled hypertension — stimulant effects may exacerbate cardiovascular risk

GERD or peptic ulcer disease — caffeine and acidity may aggravate symptoms

Esophageal disorders or history of esophageal cancer — very hot consumption is a risk factor

Bipolar disorder or schizophrenia — stimulants may destabilize mood

Iron-deficiency anemia — polyphenols reduce iron absorption

Avoid Combining With

✕Iron supplements or iron-rich meals (polyphenols inhibit non-heme iron absorption — separate by 1–2 hours)
✕Caffeine from other sources (additive stimulant load and side effects)
✕MAO inhibitors (yerba mate has weak monoamine oxidase inhibiting activity)
✕Beta-lactam antibiotics (may reduce absorption — limited evidence)
✕Alcohol (combining with high-caffeine beverages may mask intoxication)

Updated Invalid Date