| Chemical | Dosage | References |
|---|---|---|
| XANTHININE | -- | * |
| XANTHOHUMOL | -- | * |
| XANTHOPHYLL | -- | * |
| XANTHOTOXIN | -- | * |
| XYLOIDONE | -- | * |
| XYLOMOLLIN | -- | * |
| YADANZIOLIDE-A | -- | * |
| YANGONIN | -- | * |
| YATANINE | -- | * |
| YATEIN | -- | * |
| ZANTHOPHYLLINE | -- | * |
| ZIMZIN | -- | * |
| ZINC | -- | * |
| ZINGIBERENE | -- | * |
| ZIZANAL | -- | * |
| ZIZANIC-ACID | -- | * |