| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Allium sativum var. sativum | Essential Oil | -- | -- | * | |
| Lentinus edodes | Fruit | -- | -- | * | |
| Allium cepa | Essential Oil | -- | -- | Jirovetz, L., Koch, H. P., Jager, W., Remberg, G. 1992. Investigations of German Onion Oil by GC-FID, GC-MS and GC-FTIR. Pharmazie, 47(6): 455-456. | |
| Brassica oleracea var. capitata l. | Leaf | -- | -- | Wealth of India. | |
| Psidium guajava | Fruit | -- | -- | * | |
| Brassica oleracea var. botrytis l. | Plant | -- | -- | * | |
| Allium cepa | Bulb | -- | -- | * | |
| Brassica oleracea | Stem | -- | 11.21 | * | |
| Brassica oleracea var. italica | Plant | -- | -- | Jim Duke's personal files. | |
| Allium ampeloprasum | Plant | -- | -- | * | |
| Allium sativum var. sativum | Bulb | 0.6 | 2.5 | * |