# Alishan Oolong (Camellia sinensis 'Alishan')

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/alishan-oolong
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-24
**Evidence Score:** 2 / 10
**Category:** Tea Cultivars
**Also Known As:** Camellia sinensis var. sinensis 'Alishan', High Mountain Oolong, Alishan High Mountain Tea, Taiwan Oolong, Semi-fermented Tea, Wulong Cha, Ali Shan Cha

## Overview

Alishan oolong is a high-altitude Taiwan oolong tea cultivar containing 117-442 mg/L EGCG and 203-471 mg/L EGC catechins. The partial oxidation process creates unique theaflavins (14-17 mg/L) that may provide antioxidant effects through [free radical scaveng](/ingredients/condition/antioxidant)ing.

## Health Benefits

• Contains catechins (EGCG 117-442 mg/L, EGC 203-471 mg/L) - Evidence quality: Chemical analysis only, no clinical trials for this cultivar
• Provides theaflavins (14-17 mg/L) from partial oxidation - Evidence quality: Compositional data only
• Delivers flavonoids including kaempferol and quercetin derivatives - Evidence quality: Chemical characterization only
• Contains L-theanine amino acid (up to 162 mg/L pre-fermentation) - Evidence quality: Analytical data only
• Supplies minerals including potassium (92-151 mg/L) - Evidence quality: Compositional analysis only

## Mechanism of Action

EGCG and EGC catechins in Alishan oolong inhibit free radical formation by donating electrons to [reactive oxygen species](/ingredients/condition/antioxidant). Theaflavins formed during partial oxidation chelate metal ions and modulate antioxidant enzyme activity. Flavonoids like quercetin and kaempferol activate Nrf2 pathways to enhance cellular antioxidant defense systems.

## Clinical Summary

Current evidence for Alishan oolong is limited to chemical composition analysis showing catechin and theaflavin content. No clinical trials have specifically tested this cultivar's health effects in humans. While general oolong tea studies exist, the unique high-altitude growing conditions and specific oxidation profile of Alishan oolong require dedicated research. Evidence quality remains at the compositional analysis level only.

## Nutritional Profile

Alishan High Mountain Oolong tea (brewed, per 240mL serving) is a near-zero calorie beverage (<2 kcal) with negligible macronutrients. Bioactive compounds dominate its nutritional profile due to partial oxidation (typically 20-40% oxidation level). Catechins: EGCG (epigallocatechin gallate) 117-442 mg/L, EGC (epigallocatechin) 203-471 mg/L, ECG (epicatechin gallate) 45-120 mg/L, EC (epicatechin) 30-85 mg/L — concentrations vary with brewing temperature (85-95°C optimal), steep time (2-3 min), and harvest season (spring high-mountain harvests yield higher catechin density). Theaflavins: 14-17 mg/L (formed during partial oxidation; lower than black tea's 30-60 mg/L but higher than green tea's trace amounts). Thearubigins: 40-80 mg/L (estimated, based on oxidation degree). L-theanine: approximately 25-60 mg per 240mL serving (high-altitude cultivation at 1,400-2,300m elevation promotes elevated L-theanine synthesis due to reduced UV exposure and cooler temperatures; Alishan cultivar typically yields higher L-theanine than lowland oolongs). Caffeine: 30-60 mg per 240mL serving. Flavonols: kaempferol glycosides 8-15 mg/L, quercetin glycosides 10-22 mg/L, myricetin derivatives 3-8 mg/L. Minerals: fluoride 0.1-0.3 mg/240mL, manganese 0.4-0.9 mg/240mL, potassium 20-40 mg/240mL, magnesium 2-5 mg/240mL, trace zinc and selenium. Vitamins: minimal — trace vitamin C (<1 mg/240mL, largely degraded by hot water), trace B vitamins (B2 riboflavin ~0.01 mg/240mL). Bioavailability notes: catechin absorption ranges 1.5-4% of ingested dose systemically; co-consumption with milk proteins reduces catechin bioavailability by up to 25% via binding; L-theanine is highly bioavailable (~95% absorption, crosses blood-brain barrier within 30-45 min); theaflavin bioavailability is lower (~1-2%) but gut microbiota metabolize unabsorbed polyphenols into bioactive phenolic acids (e.g., 3,4-dihydroxyphenylacetic acid). The high-altitude terroir of Alishan (Ali Mountain, Chiayi County, Taiwan) produces leaves with higher polyphenol density compared to lower-elevation Taiwanese oolongs, attributed to increased UV exposure [stress response](/ingredients/condition/stress) and slower leaf growth cycles.

## Dosage & Preparation

No clinically studied dosage ranges exist for Alishan Oolong. General oolong tea infusions show variable catechin levels but lack standardization data or clinical dosing guidelines for this specific cultivar. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Alishan oolong contains caffeine and may cause [insomnia](/ingredients/condition/sleep), anxiety, or digestive upset in sensitive individuals. Catechins can reduce iron absorption when consumed with meals and may interact with blood thinning medications. High catechin intake on empty stomach may cause nausea in some people. Pregnant women should limit intake due to caffeine content and potential effects on iron absorption.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses specifically on Alishan Oolong were identified in the available research. All existing data focuses on chemical composition analysis rather than clinical outcomes, with no PubMed PMIDs available for Alishan-specific studies.

## Historical & Cultural Context

Alishan Oolong has no documented historical use in traditional medicine systems according to available research. It is primarily recognized for modern culinary qualities including floral and fruity flavors (strawberry, pear, mango) rather than medicinal applications.

## Synergistic Combinations

Green tea extract, L-theanine, white tea, matcha, gyokuro

## Frequently Asked Questions

### How much EGCG is in Alishan oolong tea?

Alishan oolong contains 117-442 mg/L of EGCG, with levels varying based on brewing conditions and harvest timing. This represents a significant concentration compared to many other tea varieties.

### What makes Alishan oolong different from regular oolong tea?

Alishan oolong is grown at high altitudes in Taiwan's Alishan mountains, creating unique flavor compounds and catechin profiles. The specific terroir and processing methods produce distinctive theaflavin levels of 14-17 mg/L.

### Can Alishan oolong help with weight loss?

While Alishan oolong contains catechins that may support metabolism, no clinical studies have specifically tested this cultivar for weight loss. General oolong research shows modest metabolic effects, but more research is needed.

### How should I brew Alishan oolong for maximum benefits?

Brew Alishan oolong at 185-195°F for 2-3 minutes to optimize catechin extraction without excessive tannins. Multiple short infusions can extract different beneficial compounds while maintaining palatability.

### Is Alishan oolong safe to drink daily?

Alishan oolong is generally safe for daily consumption in moderate amounts (2-3 cups). However, the caffeine and catechin content may cause digestive issues or interfere with iron absorption if consumed excessively.

### Does Alishan oolong contain caffeine, and how much?

Yes, Alishan oolong contains caffeine as a naturally occurring component of Camellia sinensis tea leaves. A typical 8 oz cup of brewed Alishan oolong contains approximately 30–50 mg of caffeine, which is moderate compared to black tea (40–70 mg) but higher than white tea (15–30 mg). The exact caffeine content depends on brewing time and leaf-to-water ratio.

### Is Alishan oolong safe for children to drink?

Alishan oolong is generally safe for older children in moderate amounts due to its lower caffeine content compared to coffee and black tea, though pediatric intake should be limited. Young children and infants should avoid oolong tea due to caffeine sensitivity and potential for nutrient absorption interference. Parents should consult healthcare providers before introducing oolong tea to children under 12 years old.

### What is the difference between Alishan oolong and other high-mountain oolong varieties?

Alishan oolong, grown at 1,400–2,000 meters elevation in Taiwan's Chiayi County, has a distinctly floral and fruity profile with lower astringency due to its cooler growing climate compared to lower-elevation oolongs. The high altitude slows tea plant metabolism, increasing amino acid concentrations like L-theanine while potentially affecting catechin oxidation patterns unique to Alishan cultivars. Other famous high-mountain variants like Tie Guan Yin and Da Hong Pao have different terroir, flavor profiles, and compound compositions despite similar elevation ranges.

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