Schisandrin (Dibenzocyclooctadiene Lignan · Hepatoprotective · Adaptogenic)

Compound	Schisandrin (Schizandrin A)
Chemical class	Polyphenol — Dibenzocyclooctadiene Lignan
CAS	7432-28-2
Primary source	Schisandra chinensis (five-flavour berry / Wu Wei Zi)
Key applications	Hepatoprotective, adaptogenic, cognitive, antioxidant
Claim strength	Moderate
Typical form	Schisandra extract standardised to schisandrins (9%); Schisandra fruit extract
Buy from Herbuno	Schisandra Fruit Liquid Extract (Water Soluble) - Schisandra chinensis → Schisandrins 9% Powder (Schisandra Extract) | Standardized Schisandra chinensis →

Name origin: From Schisandra (five-flavour berry genus) — the unique plant producing this class of dibenzocyclooctadiene lignans. Schisandrin (also called schizandrin A or α-schisandrin) is the primary lignan in Schisandra chinensis fruit, co-occurring with schisandrin B (γ-schisandrin), schisandrin C, deoxyschisandrin, and gomisin A among approximately 40 known Schisandra lignans. Traditional use: Schisandra (Wu Wei Zi, meaning “five-flavour fruit” — sour, sweet, salty, bitter, and pungent simultaneously) is one of the 50 fundamental herbs in TCM, prescribed for over 2,000 years as a Qi tonic, liver protectant, anti-ageing herb, respiratory support, and to enhance mental performance and sexual function. It is a primary adaptogen in TCM alongside ginseng and astragalus. Research trajectory: Schisandrin and other Schisandra lignans have a well-developed preclinical evidence base for hepatoprotection (widely used clinically in China for liver disease), adaptogenic stress response modulation, and cognitive performance. Schisandrin B has attracted specific attention for cognitive enhancement. Commercial source: Schisandrin is commercially available as a standardised Schisandra chinensis fruit extract (9% schisandrins by HPLC) in both dry powder and water-soluble liquid formats. See sourcing options below.

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Evidence for Schisandrin Applications

Hepatoprotective activity: Schisandrin and Schisandra extract reduce hepatic ALT/AST in multiple animal liver injury models (CCl4, acetaminophen, alcohol). Clinical use of Schisandra-derived compounds (schisandrin B derivative DDB — dimethyl diphenyl bicarboxylate) in China for chronic hepatitis has produced positive results in reducing liver enzymes. This is one of the more clinically applied lignan applications globally. Claim strength: Moderate.

Adaptogenic and stress-response: Schisandrin activates the MAPK stress-response pathway and modulates HPA axis activity, normalising stress hormone responses in animal models of chronic stress. Schisandra extract reduces physical fatigue markers and improves working capacity in human pilot studies — consistent with traditional adaptogenic use. Claim strength: Moderate.

Cognitive function: Schisandrin B specifically activates BDNF and CREB signalling in hippocampal neurons, improving memory consolidation and reducing cognitive decline in aged animal models. Small human studies show cognitive performance improvements with Schisandra extract. Claim strength: Moderate.

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Dosage & Formulator Specification

TCM traditional dose: 3–9 g/day dried Schisandra fruit as decoction. For standardised extract: 500–1500 mg/day Schisandra extract (standardised to minimum 2% schisandrins by HPLC). Herbuno’s Schisandrins 9% extract at 300–600 mg/day delivers 27–54 mg total schisandrins — within the range of Chinese hepatoprotective clinical dosing. For adaptogenic formulations, higher doses (800–1200 mg/day of 9% extract) align with traditional use.

Specify Schisandra extract by total schisandrins content (HPLC, minimum 2–9%). Herbuno’s 9% extract is a high-standardisation option. The liquid extract provides a convenient format for combination products. Note that schisandrin, schisandrin B, and deoxyschisandrin have different potencies; a full lignan profile CoA is valuable for premium formulations.

Schisandrins are lipophilic (logP ~3–4); lipid-containing meal co-administration improves absorption. Stable under standard processing conditions. No significant drug interactions have been documented at supplement doses, though CYP3A4 modulation by schisandrin has been noted in vitro — include standard advisory language.

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Frequently Asked Questions — Schisandrin

Why does Schisandra have five flavours?
The Chinese name Wu Wei Zi (five-flavour fruit) reflects the simultaneous presence of all five classical Chinese flavour characteristics in the berry: sour (flesh), sweet (flesh), salty (seeds), bitter (seeds), and pungent/spicy (seeds). This multi-flavour profile is considered diagnostically significant in TCM, indicating the herb’s action on all five organ systems. The five flavours reflect distinct phytochemical constituents — schisandrins (bitter/pungent), malic acid (sour), and other organic acids and sugars (sweet/salty).

What is the relationship between schisandrin and DDB (dimethyl diphenyl bicarboxylate)?
DDB (bicyclol) is a synthetic derivative of schisandrin B that has been developed in China as a pharmaceutical drug for chronic hepatitis and drug-induced liver injury. It is registered and widely used in China as a hepatoprotective medication. DDB’s development from Schisandra lignan research is one of the clearest examples of phytochemical-to-pharmaceutical drug development from a Chinese botanical.

Can Schisandra be combined with other adaptogens?
Yes — Schisandra is commonly co-formulated with rhodiola and ashwagandha in adaptogen blend formulations. The three herbs have overlapping stress-response modulation with complementary mechanisms: Schisandra (MAPK, hepatoprotective context), rhodiola (AMPK, cognitive fatigue), ashwagandha (HPA axis, cortisol modulation). There are no documented adverse interactions; the combination is established in commercial adaptogen blends.

Is the fruit or seed extract of Schisandra preferred?
The lignans (schisandrins) are concentrated primarily in the seeds of the fruit rather than the flesh. Schisandrin-standardised extracts are therefore preferably produced from seeds or whole fruit including seeds. Some commercial extracts specify “fruit and seed” to clarify that the full lignan content is captured. Flesh-only preparations have lower schisandrin content and higher organic acid content.

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Claim-strength scale – High = multiple human RCTs; Moderate = limited trials or strong preclinical convergence; Emerging = early-stage lab or animal data.

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