“Anthocyanidins (unspecified)?”Here!

Plant

Hasn’t appeared in a scanned product yet.

As a supplement

Talk to your doctor or pharmacist.

Roll Call does not check drug interactions or assess personal safety.

A broad class of plant pigments that give many fruits and vegetables their red, purple, or blue color; "unspecified" means the exact compound or plant source is not identified here.

Why it’s used

Taken by some for antioxidant properties and general interest in polyphenol intake.

What the evidence says

Research on specific anthocyanin-rich extracts, such as bilberry or blueberry, has explored roles in eye health and cardiovascular markers with some suggestive findings, but results vary by source plant and extract, and there is no NIH ODS fact sheet covering anthocyanidins as a class. Because this ingredient is unspecified, it cannot be tied to any particular study.

Where we looked

There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.

PubMed: 243 records · searched September 2026"Anthocyanidins"[Title/Abstract] AND (review[pt] OR "safety assessment"[Title/Abstract] OR "risk assessment"[Title/Abstract] OR toxicology[Title/Abstract] OR toxicity[Title/Abstract] OR characterization[Title/Abstract] OR characterisation[Title/Abstract])
PubMed: 5 records · searched September 2026"Anthocyanidins"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH]
PubMed: 969 records · searched September 2026"Anthocyanidins"[Title/Abstract]

This says what this database holds under these terms. It is not a finding that no research exists.

Context

Studies of anthocyanin-rich extracts have used a range of extract doses that are not comparable across different plant sources, and none can be assumed to apply to an unnamed anthocyanidin ingredient.

Rumors

1
Anthocyanidin supplements cause side effects such as stomach upsets, rashes and problems passing urine.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Arthritis UK — an advocacy group: arthritis charity funding research, campaigning and support
  How we know who this is
  “Arthritis UK is the leading arthritis charity, changing lives through research, campaigning and support.” (their page)
2
Anthocyanidins strengthen blood vessels and support circulation, relieving heavy, tired legs.
Not gradedhealth and safety evidence
Sources cited — no verdict reached.
What was measured is not yet noted.
- The Effect of Anthocyanin-Rich Foods or Extracts on Vascular Function in Adults: A Systematic Review and Meta-Analysis of Randomised Controlled Trials (Peer-reviewed) · Funding not checked
- Anthocyanins, Anthocyanin-Rich Berries, and Cardiovascular Risks: Systematic Review and Meta-Analysis of 44 Randomized Controlled Trials and 15 Prospective Cohort Studies (Peer-reviewed) · Funded by National Natural Science Foundation of China; Guangzhou Science, Technology and Innovation Committee; Guangdong Basic and Applied Basic Research Foundation; CNS Research Fund for DRI (government) · No conflicts declared
Who’s saying this
- Nature's Best — a brand: sells UK-made vitamin and mineral supplements
  How we know who this is
  “At Nature’s Best, we revel in the exquisite harmony between science and nature in creating our supplements.” (their page)
  “All our supplements are made to GMP standards using the highest grade raw materials to ensure quality, safety and efficacy.” (their page)
3
Anthocyanidins support eye health and night vision.
Does not support — suggestivehealth and safety evidence
Studied in: young males with good vision.
Measured as an outcome.
- The effect of bilberry nutritional supplementation on night visual acuity and contrast sensitivity (Peer-reviewed) · Funding not checked
Who’s saying this
- Nature's Best — a brand: sells UK-made vitamin and mineral supplements
  How we know who this is
  “At Nature’s Best, we revel in the exquisite harmony between science and nature in creating our supplements.” (their page)
  “All our supplements are made to GMP standards using the highest grade raw materials to ensure quality, safety and efficacy.” (their page)
4
Anthocyanidins are strong antioxidants.
Supports — suggestivehealth and safety evidence
Measured as a biomarker.
- A dose-response evaluation of purified anthocyanins on inflammatory and oxidative biomarkers and metabolic risk factors in healthy young adults: A randomized controlled trial (Peer-reviewed) · Funding not checked
Who’s saying this
- Arthritis UK — an advocacy group: arthritis charity funding research, campaigning and support
  How we know who this is
  “Arthritis UK is the leading arthritis charity, changing lives through research, campaigning and support.” (their page)
5
Anthocyanidin supplements protect and repair the body's collagen.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Lamberts — a brand: sells dietary supplements to practitioners and pharmacists
  How we know who this is
  “Established in 1982, Lamberts is the UK’s leading supplier of specialist dietary supplements to practitioners and pharmacists using nutrition and herbs in healthcare.” (their page)