Didymin (Citrus Flavanone Glycoside · Antioxidant / Neuroprotective)
Compiled from published pharmacological and botanical literature. Not independently verified by Herbuno. Spotted an error or have a correction? Flag it below →
| Compound | Didymin (Isosakuranetin-7-O-rutinoside; Neoponcirin) |
| Chemical class | Flavonoid — Flavanone glycoside (rutinoside of isosakuranetin) |
| CAS | 14259-47-3 |
| Primary source | Citrus spp. — oranges, grapefruit, lemons, mandarins (peel and fruit) |
| Key applications | Antioxidant; anti-inflammatory; neuroprotective; antitumour research |
| Claim strength | Emerging |
| Typical form | Citrus bioflavonoid complex — didymin as a minor co-flavanone (~1.6–2.5 mg/g in fruit) |
| Buy from Herbuno |
Citrus Bioflavonoid 40% Powder → Citrus Sinensis Orange Peel Extract Powder → |
Name origin: Didymin, also known as neoponcirin, is the 7-O-rutinoside of isosakuranetin — that is, isosakuranetin (the 4'-methyl ether of naringenin) bearing a rutinose disaccharide at the 7-position. It belongs to the flavanone glycosides, the same structural family as hesperidin and naringin, which together define the citrus bioflavonoid complex. Traditional use: Didymin has no separate traditional identity; it reaches the diet as one constituent of citrus fruit and peel, materials with a long history of culinary and medicinal use across many cultures, particularly the dried peel preparations of Chinese medicine (chenpi) and the bitter-orange traditions of Europe. Its relevance is as part of that whole-fruit flavanone matrix. Research trajectory: Interest in didymin as a distinct compound is comparatively recent. A dedicated review has surveyed the recent trends in its potential therapeutic applications, gathering the preclinical evidence for antioxidant, anti-inflammatory, neuroprotective, and antitumour activity and documenting its distribution across citrus species Yao 2018Yao 2018 (PMC). The most-cited individual finding is its induction of a Fas-mediated apoptotic pathway in human non-small-cell lung cancer cells Hung 2010. The evidence base remains preclinical throughout, with no human clinical trials, and didymin is best characterised as a genuine but modestly abundant citrus flavanone attracting early scientific attention. Commercial source: Didymin is delivered within the citrus bioflavonoid complex; Citrus Bioflavonoid 40% Powder is available from Herbuno, with orange peel extract as an alternative whole-peel input.
Evidence for Didymin Applications
Antitumour activity: Didymin induces a Fas-mediated apoptotic pathway in human non-small-cell lung cancer cells, the single most-characterised individual finding for the compound and one that established it as a dietary flavonoid worth investigating in its own right Hung 2010. This remains an in vitro result. Claim strength: Emerging.
Antioxidant and anti-inflammatory activity: Review of the compound's therapeutic potential documents antioxidant and anti-inflammatory effects across preclinical models, consistent with the general behaviour of the citrus flavanones and the electron-donating capacity of the flavanone core Yao 2018. Claim strength: Emerging.
Neuroprotective interest: Didymin has been examined for neuroprotective activity, one of several activity areas gathered in the review literature on its potential therapeutic applications Yao 2018. These findings are early-stage and drawn from laboratory models. Claim strength: Emerging.
Citrus content: Reported didymin contents are modest — on the order of 1.6 mg/g in Valencia oranges and around 2.5 mg/g in Rio Red grapefruit — establishing it as a genuine but minor citrus flavanone, present at levels well below the dominant hesperidin Yao 2018 (PMC). Claim strength: Emerging.
Relationship to the citrus flavanone family: As the rutinoside of isosakuranetin, didymin sits structurally alongside hesperidin (the rutinoside of hesperetin) and naringin, and the three are absorbed and metabolised by the same route: the glycosides are poorly absorbed intact and are hydrolysed by colonic microbiota to their aglycones before uptake, a shared pharmacokinetic pattern that governs the whole class. Claim strength: Moderate.
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Dosage & Formulator Specification
No isolated didymin human dosing data exist, and it is not offered or studied as a standalone dose. Didymin is delivered as a minor co-flavanone within the citrus bioflavonoid complex rather than as a standardised single ingredient, and at reported fruit contents of roughly 1.6–2.5 mg/g it is a genuine but modest constituent. The appropriate specification for material is total citrus bioflavonoid content by HPLC, within which hesperidin dominates and didymin is a small fraction.
Citrus Bioflavonoid 40% Powder provides didymin within the total flavonoid fraction and is the closest practical input; Citrus Sinensis Orange Peel Extract Powder is a whole-peel alternative. It should be stated plainly that neither product is standardised to didymin specifically, and a formulator wanting a defined didymin content would need a custom specification and batch assay rather than relying on the standard bioflavonoid grade.
The pharmacokinetics of the class are the practical constraint on any citrus flavanone formulation. Flavanone rutinosides such as didymin and hesperidin are poorly absorbed intact; they pass to the colon, where microbiota hydrolyse the sugar to release the aglycone, which is then absorbed and extensively conjugated. This means inter-individual variation in gut microbiota substantially affects exposure, and it explains why aglycone or enzymatically-modified forms are sometimes preferred where higher bioavailability is the objective.
For the formulator, didymin is best positioned as a characterising minor constituent of a citrus bioflavonoid ingredient rather than as an active in its own right, with any communication reflecting the preclinical status of its individual evidence and relying on the established compositional and safety profile of citrus flavonoid material.
Frequently Asked Questions — Didymin
What is didymin?
Didymin (isosakuranetin-7-O-rutinoside, also called neoponcirin) is a dietary flavanone glycoside of citrus fruits. It is the rutinoside of isosakuranetin and occurs across oranges, grapefruit, lemons, and mandarins, contributing to the citrus bioflavonoid complex.
Which Herbuno product contains didymin?
Citrus Bioflavonoid 40% Powder delivers didymin within the total citrus flavonoid fraction, where hesperidin is the dominant constituent and didymin a minor co-flavanone. Citrus Sinensis Orange Peel Extract Powder is an alternative whole-peel input. Neither is standardised to didymin specifically.
What is didymin studied for?
Preclinical work reports antioxidant, anti-inflammatory, neuroprotective, and antitumour activity, and a dedicated review has surveyed its therapeutic potential. In non-small-cell lung cancer cells, didymin has been shown to induce a Fas-mediated apoptotic pathway. The evidence is preclinical, without human clinical trials.
How much didymin is in citrus?
Reported contents are modest: on the order of 1.6 mg/g in Valencia oranges and around 2.5 mg/g in Rio Red grapefruit. Didymin is therefore a genuine but minor citrus flavanone, present at levels well below hesperidin in most citrus material.
Related compounds: Hesperidin, Hesperetin, Naringenin, Naringin
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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