Chrysin, also called 5,7-dihydroxyflavone, is a flavone found in honey, propolis, the passion flowers, Passiflora caerulea and Passiflora incarnata, and in Oroxylum indicum. It is extracted from various plants, such as the blue passion flower (Passiflora caerulea). Following oral intake by humans, chrysin has low bioavailability and rapid excretion. It is under basic research to evaluate its safety and potential biological effects.

Chrysin

Names
IUPAC name 5,7-Dihydroxyflavone
Preferred IUPAC name 5,7-Dihydroxy-2-phenyl-4H-1-benzopyran-4-one
Other names NP-005901; Galangin flavanone
Identifiers
CAS Number	480-40-0 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:75095 N
ChEMBL	ChEMBL117 Y
ChemSpider	4444926 Y
ECHA InfoCard	100.006.864
KEGG	C10028 Y
PubChem CID	5281607
UNII	3CN01F5ZJ5 Y
CompTox Dashboard (EPA)	DTXSID1022396
InChI InChI=1S/C15H10O4/c16-10-6-11(17)15-12(18)8-13(19-14(15)7-10)9-4-2-1-3-5-9/h1-8,16-17H Y Key: RTIXKCRFFJGDFG-UHFFFAOYSA-N Y InChI=1/C15H10O4/c16-10-6-11(17)15-12(18)8-13 (19-14(15)7-10)9-4-2-1-3-5-9/h1-8,16-17H Key: RTIXKCRFFJGDFG-UHFFFAOYAO
SMILES O=C\1c3c(O/C(=C/1)c2ccccc2)cc(O)cc3O
Properties
Chemical formula	C15H10O4
Molar mass	254.241 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Chrysin is an ingredient in dietary supplements. As of 2016, there was no clinical use of chrysin, and no evidence for its effect on testosterone levels. In 2016, the US Food and Drug Administration did not recommend chrysin be included on the list of bulk drug substances that can be used in compounding under section 503A of the Federal Food, Drug, and Cosmetic Act.