| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Averrhoa carambola | Fruit | 200.0 | 4935.0 | 0.0 | * |
| Bacopa monnieri | Shoot | -- | 630.0 | -0.3 | Wealth of India. |
| Bactris gasipaes | Fruit | 110.0 | 828.0 | -0.2 | * |
| Balanites aegyptiacus | Fruit | -- | 390.0 | -0.3 | * |
| Barosma betulina | Leaf | -- | 4900.0 | 0.0 | * |
| Basella alba | Leaf | 1020.0 | 14785.0 | 0.9 | * |
| Benincasa hispida | Fruit | 130.0 | 6750.0 | 0.1 | * |
| Berberis vulgaris | Fruit | 1560.0 | 3800.0 | -0.0 | * |
| Berberis vulgaris | Leaf | -- | -- | Jim Duke's personal files. | |
| Berberis vulgaris | Bark | -- | -- | * | |
| Berberis vulgaris | Root | -- | -- | -0.6 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Bertholletia excelsa | Seed | -- | 7.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Beta vulgaris | Leaf | 120.0 | 3696.0 | -0.1 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Beta vulgaris | Root | 50.0 | 868.0 | -0.1 | * |
| Bixa orellana | Fruit | 20.0 | 130.0 | -0.3 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Blighia sapida | Aril | 260.0 | 1530.0 | * | |
| Blighia sapida | Seed | 780.0 | 2735.0 | 1.3 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Boehmeria nivea | Leaf | 730.0 | 5615.0 | 0.1 | * |
| Borago officinalis | Shoot | -- | 39.0 | -0.4 | Jim Duke's personal files. |
| Borago officinalis | Leaf | 30.0 | 5005.0 | 0.0 | * |