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Compound · Flavonoid

Quercetin

Quercetin Phytosome is a flavonoid. Flavonoid studied in immune and inflammatory-response research.

Quercetin Phytosome · updated 24 Oct 2026

Quercetin is a flavonoid, a plant polyphenol of the flavonol subgroup found in foods such as onions, apples and capers, listed in the Celyfe compound library as a quercetin phytosome and filed as a flavonoid studied in immune and inflammatory-response research. It is not carried in any Celyfe pen.

What is quercetin?

Flavonoids are a large class of plant polyphenols, and quercetin is one of the most widespread flavonols among them. A phytosome is a preparation in which the plant compound is complexed with phospholipids, which is the form the library entry names. The Celyfe library classes quercetin as a flavonoid with an oral delivery route and the mechanism note: flavonoid studied in immune and inflammatory-response research. It is not a peptide and not a regulated compound.

Is quercetin in a Celyfe pen?

No. The polyphenol that does travel in a Celyfe pen is trans-resveratrol, at 25mcg in the vehicle of the NAD+ Precision Pen. The phospholipid used in phytosome preparations is related to the phosphatidylcholine carrier in that same pen, but quercetin itself is not in any of the four pens. Celyfe does not currently sell it as a product and lists no quercetin reference, so this page makes no statement about research findings.

Key takeaways

  • •Quercetin Phytosome is a flavonoid.
  • •Library note: Flavonoid studied in immune and inflammatory-response research.
  • •Library entry: not currently carried in a Celyfe pen.

At a glance

Class
Flavonoid
Full name
Quercetin Phytosome

Role in the library

Flavonoid studied in immune and inflammatory-response research.

Compared with

Frequently asked questions

Sources

  1. NAD+ Precision Pen (product page)
  2. Compare: EGCG vs Quercetin
  3. Compare: Curcumin vs Astaxanthin
  4. Guide: How to store research peptides
Quercetin: Flavonol Flavonoid, Phytosome Form | Celyfe