| # Activity | Chemical | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|---|
| 5 | TUBEROSIN | Plant | -- | -- | * | |
| 11 | TYRAMINE | Fruit | -- | -- | * | |
| 1 | TYROSINASE | Plant | -- | -- | * | |
| 8 | TYROSINE | Tuber | 770.0 | 3900.0 | -0.04 | * |
| 22 | UMBELLIFERONE | Tuber | -- | -- | * | |
| 3 | VALINE | Tuber | 117.0 | 6450.0 | -0.16 | * |
| 0 | VIT-B-6 | Tuber | 2.5 | 12.5 | * | |
| 24 | VITAMIN-B-1 | Tuber | -- | -- | * | |
| 0 | VITAMIN-B-2 | Tuber | -- | 0.3 | * | |
| 0 | VITAMIN-B-6 | Tuber | 2.5 | 12.5 | USDA's Ag Handbook 8 and sequelae) | |
| 0 | WATER | Tuber | 700000.0 | 800000.0 | 0.15 | * |
| 0 | XYLOSYL-GLUCOSE | Plant | -- | -- | * | |
| 0 | YAMOGENIN | Plant | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| 5 | ZEAXANTHIN | Tuber | -- | 0.04 | * | |
| 77 | ZINC | Tuber | 1.9 | 44.1 | 0.82 | * |
| 0 | ZIRCONIUM | Plant | 0.52 | 1.4 | -1.36 | * |