Doc:FL63AC
From Metabolomics.JP
Catechins refer to a subgroup of Flavan 3-ol derivatives (FL63AC). In a stricter sense, it means (+)-Catechin and its stereoisomer (-)-Epicatechin, both of which are naturally abundant.
| Structure | 
|
|
|
|
|---|---|---|---|---|
| Name | (+)-Catechin or D-Catechin |
(-)-Epicatechin or L-Epicatechin |
ent-Catechin or (-)-Catechin |
ent-Epicatechin or (+)-Epicatechin |
| B-ring stereo | ↓ | ↓ | ↑ | ↑ |
| 3-Hydroxyl stereo | ↑ | ↓ | ↓ | ↑ |
| Gallocatechins | (+)-Gallocatechin | (-)-Epigallocatechin | (-)-Gallocatechin |
Among the stereoisomers, the bioavailability in human follows the order:
| (-)-epicatechin | > | (+)-catechin | = | (+)-epicatechin | > | (-)-catechin |
The circulation level of (-)-epicatechin is 6 times higher than that of (-)-catechin.
