Delphinidin (Anthocyanidin · Neuroprotective · Cardioprotective)

Compound	Delphinidin
Chemical class	Polyphenol — Anthocyanidin (3,5,7,3′,4′,5′-Hexahydroxyflavylium)
CAS	528-53-0
Primary source	Vaccinium corymbosum (blueberry), V. myrtillus (bilberry), Ribes nigrum (black currant)
Key applications	Antioxidant, anti-inflammatory, cognitive ageing, cardioprotective
Claim strength	Moderate
Typical form	Blueberry extract; bilberry extract; black currant extract
Buy from Herbuno	Blueberry Powder →

Name origin: From Delphinium (larkspur), the flowering plant in which it was characterised — reflecting the characteristic blue-purple pigmentation this trihydroxylated anthocyanidin imparts. Delphinidin has three hydroxyl groups on the B-ring (pyrogallol pattern) versus cyanidin’s two (catechol), giving it higher antioxidant capacity and a distinctly blue-shifted colour. Traditional use: Blueberry and bilberry preparations have been used in European folk medicine for visual acuity, circulatory support, and urinary tract health for centuries. Bilberry (Vaccinium myrtillus) extract was used by British RAF pilots in WWII for night vision improvement. Delphinidin is a key anthocyanidin co-responsible for these activities. Research trajectory: Delphinidin has meaningful preclinical evidence for neuroprotective, cardioprotective, and anti-inflammatory activity, with human data derived primarily from blueberry, bilberry, and black currant extract clinical trials. Commercial source: Commercially available as a constituent of blueberry, bilberry, and black currant extracts standardised to total anthocyanin content. See sourcing options below.

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Evidence for Delphinidin Applications

Antioxidant and neuroprotective: Delphinidin’s trihydroxylated B-ring confers superior radical-scavenging capacity versus cyanidin and most other anthocyanidins. It crosses the blood-brain barrier and reduces neuroinflammation (microglial activation) in animal ageing models. Blueberry extract RCTs demonstrate improvements in memory and cognitive function in older adults. Claim strength: Moderate (blueberry extract RCTs; delphinidin-specific attribution moderate).

Cardioprotective: Delphinidin reduces LDL oxidation, suppresses platelet aggregation, and improves endothelial function in cell and animal models. Human blueberry consumption studies show cardiovascular biomarker improvements including reduced arterial stiffness and improved lipid profiles. Claim strength: Moderate.

Anti-inflammatory: Delphinidin inhibits NF-κB and reduces COX-2 with potency exceeding cyanidin in parallel assays, consistent with the additional B-ring hydroxyl. In vivo anti-inflammatory efficacy in arthritis and colitis models is documented. Claim strength: Moderate.

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Dosage & Formulator Specification

Blueberry extract clinical studies: 500–1000 mg/day freeze-dried blueberry or 100–300 mg/day standardised blueberry anthocyanin extract for cognitive and cardiovascular applications. Delphinidin typically constitutes 30–50% of total blueberry anthocyanins alongside malvidin, peonidin, cyanidin, and petunidin.

Specify blueberry extract by total anthocyanin content (pH differential, minimum 25% for concentrated extracts) and request an individual anthocyanin profile confirming delphinidin glycoside fractions. For bilberry-focused cognitive applications, bilberry extract (minimum 25% anthocyanins) delivers a higher delphinidin fraction relative to blueberry.

Stability considerations identical to cyanidin — pH-sensitive (stable below pH 3.5 in liquid formats); encapsulated powder formats are stable. The additional B-ring hydroxyl of delphinidin makes it slightly more susceptible to oxidative degradation than cyanidin; nitrogen-flushed packaging is advisable.

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Frequently Asked Questions — Delphinidin

Why does bilberry contain more delphinidin than blueberry?
Bilberry (Vaccinium myrtillus) has higher total anthocyanin content than highbush blueberry (V. corymbosum), and its anthocyanin profile is enriched in delphinidin glycosides relative to the broader mix in cultivated blueberry. Wild bilberry is considered the premium source for eye and vision-related applications due to this enriched delphinidin fraction.

Is the WWII bilberry and night vision claim substantiated?
The RAF pilot bilberry story is anecdotal and has not been substantiated in controlled clinical trials. Bilberry extract RCTs do not consistently demonstrate improved night vision in normal-sighted individuals. However, bilberry anthocyanins do show evidence for retinal protection, reduced eye fatigue, and improved visual acuity in conditions of existing retinal stress — distinct from the specific night vision enhancement claimed in the historical anecdote.

Is delphinidin better than cyanidin for cognitive applications?
In comparative cell and animal studies, delphinidin shows superior neuroprotective activity attributable to its higher antioxidant capacity and potentially better CNS penetration. However, most blueberry cognitive clinical trials use full-spectrum anthocyanin extracts, making single-compound attribution difficult. For cognitive formulations, specifying total blueberry or bilberry anthocyanin content (with a profile confirming significant delphinidin fraction) is more practical than isolated delphinidin.

Can black currant extract serve as a high-delphinidin alternative to bilberry?
Yes. Black currant (Ribes nigrum) extract has a high delphinidin fraction (delphinidin-3-glucoside and delphinidin-3-rutinoside as primary anthocyanins) and total anthocyanin content of 25–30% in standardised extracts — comparable to bilberry. It is an increasingly popular and cost-competitive alternative for cardiovascular and anti-inflammatory anthocyanin formulations. Herbuno supplies both Black Currant Extract Powder and Black Currant Liquid Extract.

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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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