| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Solanum nigrum | Plant | 1.0 | 23.0 | 0.8 | * |
| Perilla frutescens | Leaf | 3.0 | 23.0 | -0.1 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Rumex acetosa | Leaf | 2.2 | 22.0 | -0.1 | * |
| Allium schoenoprasum | Leaf | 1.0 | 22.0 | -0.1 | * |
| Boehmeria nivea | Leaf | 2.8 | 22.0 | -0.1 | * |
| Carica papaya | Leaf | 5.0 | 21.0 | -0.1 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Sesamum indicum | Leaf | -- | 21.0 | -0.1 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Brassica oleracea var. botrytis l. | Leaf | 1.1 | 21.0 | -0.1 | * |
| Coriandrum sativum | Leaf | 1.0 | 21.0 | -0.1 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Borago officinalis | Leaf | 1.0 | 21.0 | -0.1 | USDA's Ag Handbook 8 and sequelae) |
| Brassica oleracea var. italica | Leaf | 1.1 | 21.0 | -0.1 | * |
| Tetragonia tetragonioides | Leaf | 1.0 | 20.0 | -0.1 | * |
| Armoracia rusticana | Root | 4.0 | 20.0 | 3.5 | * |
| Mimulus glabratus | Shoot | 2.0 | 20.0 | 0.2 | * |
| Amaranthus spinosus | Leaf | 1.6 | 20.0 | -0.1 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Erythroxylum coca | Leaf | 15.0 | 20.0 | -0.1 | * |
| Capsicum annuum | Fruit | -- | 19.0 | 3.0 | * |
| Ipomoea batatas | Leaf | 2.6 | 19.0 | -0.1 | * |
| Chenopodium ambrosioides | Leaf | 3.0 | 19.0 | -0.1 | * |
| Taraxacum officinale | Leaf | 1.0 | 18.0 | -0.1 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |