# Goldthread (Coptis chinensis)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/goldthread
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 4 / 10
**Category:** Traditional Chinese Medicine
**Also Known As:** Coptis chinensis, Chinese goldthread, Huang Lian, Huanglian, Chinese coptis, Goldthread root, Coptis rhizome

## Overview

Goldthread (Coptis chinensis) is a Traditional Chinese Medicine herb containing high concentrations of berberine alkaloids, with extracts yielding up to 45.4 mg/g berberine. The herb's bioactive isoquinoline alkaloids including berberine, coptisine, and palmatine have been studied for [antimicrobial](/ingredients/condition/immune-support) and metabolic effects.

## Health Benefits

• Traditional use in Chinese medicine as one of the 50 fundamental herbs (traditional evidence only)
• Contains berberine alkaloid (up to 45.4 mg/g in extracts) with potential bioactivity (no clinical evidence)
• Rich in isoquinoline alkaloids including coptisine and palmatine (no clinical evidence)
• Contains [antioxidant](/ingredients/condition/antioxidant) compounds like quercetin (no clinical evidence)
• Yields up to 146.3 mg/g total alkaloids under optimized extraction (no clinical evidence for health effects)

## Mechanism of Action

Goldthread's primary bioactive compound berberine activates AMP-activated protein kinase (AMPK) pathways and inhibits bacterial DNA gyrase. Coptisine and palmatine alkaloids demonstrate [antimicrobial](/ingredients/condition/immune-support) activity through cell membrane disruption and interference with bacterial protein synthesis. These isoquinoline alkaloids also modulate glucose metabolism by enhancing [insulin sensitivity](/ingredients/condition/weight-management).

## Clinical Summary

Current evidence for goldthread is limited to preclinical studies and traditional use documentation. Laboratory studies have isolated and quantified berberine concentrations up to 45.4 mg/g in standardized extracts. In vitro [antimicrobial](/ingredients/condition/immune-support) studies show activity against various bacterial strains, but human clinical trials are lacking. The herb remains classified as traditional medicine with insufficient clinical evidence for specific health claims.

## Nutritional Profile

Goldthread (Coptis chinensis) is not consumed as a food source and therefore lacks a conventional macronutrient profile (negligible protein, fat, carbohydrate, and fiber per typical medicinal dose of 1.5–12 g dried rhizome). Its significance lies entirely in its bioactive alkaloid and phytochemical content. **Primary alkaloids (isoquinoline class):** Berberine is the dominant compound at approximately 5–9% of dried rhizome weight (50–90 mg/g; up to 45.4 mg/g in standardized aqueous extracts), followed by coptisine (~1.5–3.5% dry weight), palmatine (~0.5–2.5% dry weight), jatrorrhizine (~0.5–1.5% dry weight), and epiberberine (~0.3–1.0% dry weight). Total alkaloid content can reach 10–15% of dried rhizome. **Secondary bioactive compounds:** Ferulic acid, magnoflorine (aporphine alkaloid), worenine, columbamine, and trace lignans. **Phenolic/flavonoid compounds:** Quercetin and chlorogenic acid are present in minor quantities (exact concentrations variable by extraction method). Total phenolic content of ethanolic extracts has been reported at approximately 146.3 mg gallic acid equivalents per gram of extract. **Minerals:** Trace amounts of potassium, calcium, magnesium, iron, zinc, and manganese are present in the rhizome but are not nutritionally significant at medicinal doses. **Bioavailability notes:** Berberine has notoriously poor oral bioavailability (estimated <5% in humans) due to extensive first-pass [metabolism](/ingredients/condition/weight-management) by CYP enzymes and P-glycoprotein efflux in the intestinal wall. Gut microbiota may convert berberine to dihydroberberine, which has higher intestinal absorption and is re-oxidized back to berberine in tissues. Coptisine and palmatine share similarly low oral bioavailability profiles. The alkaloids are water-soluble salts (typically chloride or sulfate forms in the plant), making them extractable in traditional decoctions, though absorption remains limited. Co-administration with P-glycoprotein inhibitors or lipid-based delivery systems may enhance bioavailability.

## Dosage & Preparation

No clinically studied dosage ranges are available as no human clinical trials have been documented. Extraction studies optimize for alkaloid yield but do not specify therapeutic dosing. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Goldthread safety profile in humans is not well-established through clinical studies. Berberine-containing herbs may interact with diabetes medications by enhancing hypoglycemic effects. Potential gastrointestinal side effects including nausea and diarrhea have been reported with berberine supplements. Pregnancy and breastfeeding safety data is insufficient, and the herb may interact with cytochrome P450 enzymes affecting drug [metabolism](/ingredients/condition/weight-management).

## Scientific Research

No human clinical trials, randomized controlled trials (RCTs), or meta-analyses for Coptis chinensis were found in the available research. The current evidence is limited to extraction optimization studies and chemical characterization of alkaloid content.

## Historical & Cultural Context

Coptis chinensis is recognized as one of the 50 fundamental herbs in traditional Chinese medicine, where it has been historically valued for its isoquinoline alkaloids from the rhizomes. Specific traditional indications and duration of use are not detailed in the available research.

## Synergistic Combinations

Other berberine-containing herbs, turmeric, milk thistle, green tea extract, quercetin

## Frequently Asked Questions

### How much berberine is in goldthread extract?

Standardized goldthread extracts contain up to 45.4 mg of berberine per gram of extract. The concentration varies significantly depending on extraction methods and plant source quality.

### What alkaloids are found in Coptis chinensis?

Goldthread contains isoquinoline alkaloids including berberine, coptisine, palmatine, and epiberberine. Berberine typically represents the highest concentration among these bioactive compounds.

### Can goldthread interact with diabetes medications?

Goldthread's berberine content may enhance the hypoglycemic effects of diabetes medications, potentially causing blood sugar to drop too low. Diabetics should consult healthcare providers before use.

### Is goldthread safe during pregnancy?

Safety data for goldthread use during pregnancy is insufficient. Berberine-containing herbs are generally not recommended during pregnancy due to potential uterine stimulant effects.

### What is goldthread used for in Traditional Chinese Medicine?

In TCM, goldthread is classified as one of the 50 fundamental herbs and traditionally used for clearing heat and dampness. It's commonly prescribed for digestive issues and inflammation-related conditions.

### What is the difference between goldthread extract and goldthread root powder?

Goldthread extracts are concentrated forms that isolate alkaloids like berberine, potentially delivering higher levels of active compounds per dose compared to whole root powder. Root powder contains the full plant matrix including fiber and other constituents, but may have lower bioavailability of specific alkaloids. Extract forms are typically standardized to berberine content, while powders vary significantly depending on plant part and processing method.

### Is goldthread safe for children or elderly individuals?

Safety data for goldthread in children is limited, and pediatric use is not well-established in clinical research. Elderly individuals may need dose adjustments due to potential interactions with medications commonly used in aging populations, particularly blood thinners and antidiabetic drugs. Consultation with a healthcare provider is recommended before giving goldthread to children or using it in elderly populations.

### Does goldthread have any side effects or toxicity concerns?

While goldthread has traditional use spanning centuries, clinical data on side effects in humans is limited. The berberine alkaloid content raises theoretical concerns about gastrointestinal effects and potential liver stress at very high doses, though these have not been well-documented in human studies. Long-term safety and optimal dosing thresholds have not been established through rigorous clinical trials.

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