Herb module
Huang Lian
CoptisCoptidis Rhizoma
An intensely bitter golden root, used to clear Heat and drain Dampness, and the lead herb in Zoi's Metabolic Balance™.
Huang Lian is one of the classic cooling herbs of Traditional Chinese Medicine, used when there is too much Heat, Fire, and Dampness in the body. It sits first on the Metabolic Balance™ fact sheet. Much modern interest in it centers on berberine, the bright yellow compound that gives the root its color and bitterness.
Best functions
- Traditionally used to clear Heat and drain Dampness
- Used to drain Fire and Fire toxicity
- Clears Heat to stop bleeding
- Drains Stomach Fire
- Studies suggest its berberine supports healthy metabolism and weight balance, including effects on cravings and gut bacteria
Fascinating facts
- 'Huang' means yellow and 'Lian' means linked. The name describes the knobbly, jointed rootstock, which is bright yellow inside.
- Zoi's materials note that Huang Lian has been used in Traditional Chinese Medicine for over 2000 years in connection with blood sugar.
- Berberine is the yellow compound behind the root's color and famously bitter taste. It also occurs in other golden-rooted plants such as barberry and goldenseal.
- Research has looked at how berberine activates AMPK, a cellular energy sensor, and encourages the release of GLP-1, a gut hormone involved in appetite and blood sugar.
In Traditional Chinese Medicine
Huang Lian is cold in nature with a bitter flavor, and it is known as a Heat-clearing herb. It enters the Heart, Large Intestine, and Stomach channels.
Biomedical deep dive
Huang Lian Coptis
From the Zoi Medicinals fact sheets’ Biomedical Details, with lines from Noa’s herb notes marked “Noa’s notes”.
On the fact sheet
- Huang Lian (Coptidis Rhizoma) is cold and enters the HT, LI, LI and ST meridians; clears Heat and drains Damp, drains Fire and Fire toxicity, clears Heat and stops bleeding and drains Stomach Fire. Metabolic Balance · sheet
Key active constituents
- Berberine, a bitter alkaloid; the sheet says Huang Lian is high in it and links Huang Lian's anti-diabetic effects to it.
Pharmacology and mechanisms
- Berberine has been shown to have significant effects on metabolism and weight, including food cravings, blood sugar, cholesterol and triglycerides.
- Berberine's bitter taste stimulates GLP-1 release from hormone-making cells in the gut; GLP-1 helps regulate insulin and blood sugar.
- Berberine may support blood sugar partly through the gut microbiome, lowering inflammation and increasing bacteria that make beneficial short-chain fatty acids such as butyrate.
- Berberine has strong antiviral and antimicrobial activity in studies, including against H. pylori, herpes virus, HPV, fungi and many parasites.
- Berberine shows antioxidant, anti-apoptotic (cell-protecting) and anti-ischemic (low-blood-flow protecting) effects, and supports cardiovascular function.
- Berberine has anti-inflammatory and pain-relieving properties studied in nerve pain and sciatic nerve injury.
What the research says
- Animals on a high-fat diet given berberine ate less and had lower body weight, body fat, blood glucose and leptin (a fullness hormone) (Park et al., Biomed Res Int 2020).
- A review of 14 randomized trials of Huang Lian in type 2 diabetes found benefits comparable to conventional drugs, including insulin sensitivity and insulin secretion (Wang et al., Biomed Res Int 2014).
- A review of 46 randomized trials found berberine safe and effective, with lower HbA1c, fasting and after-meal glucose, insulin resistance, triglycerides and LDL, and higher HDL (Guo et al., 2021).
- One study suggested berberine reduced relapse into morphine and cocaine seeking in an addiction model, hinting at effects on brain chemistry (Shen et al., Front Pharmacol 2020).
- Berberine has been studied for protecting the liver (including fatty liver), digestive tract, heart, kidneys and nervous system (Song et al., Front Med 2020).
Safety, interactions and cautions
- Every Zoi fact sheet: do not use if pregnant or breastfeeding unless directed by your health care practitioner.
- The Metabolic Balance fact sheet cautions that the formula may be contraindicated with prescription blood thinners or anti-diabetic drugs.
- Caution with Spleen and Stomach deficiency Cold (Traditional Chinese Medicine terms). Noa’s notes
- Metabolic Balance™ is not for everyday use in children. It can be used short term to support the gut with parasites or gut infections in children, at 1 dropper full 3x per day. Always review an infection with your physician.
In these Zoi formulas
- ★ Metabolic Balance (#1 on the fact sheet)
