| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Artemisia vulgaris | Shoot | -- | 2700.0 | -0.7 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Artemisia capillaris | Plant | -- | 1000.0 | -1.0 | * |
| Artocarpus heterophyllus | Fruit | 370.0 | 1380.0 | -0.3 | * |
| Artocarpus altilis | Fruit | 220.0 | 975.0 | -0.5 | * |
| Asiasarum sieboldii | Root | 2520.0 | 2600.0 | 0.0 | * |
| Asiasarum heterotropoides | Root | 2520.0 | 2600.0 | 0.0 | * |
| Asimina triloba | Fruit | 1090.0 | 5128.0 | 1.4 | * |
| Aspalathus linearis | Leaf | -- | -- | * | |
| Aspalathus linearis | Shoot | -- | 3300.0 | -0.6 | * |
| Aspalathus linearis | Plant | -- | 140.0 | -1.2 | * |
| Asparagus officinalis | Shoot | 120.0 | 7000.0 | -0.1 | * |
| Asparagus officinalis | Root | 240.0 | 2400.0 | -0.1 | * |
| Asparagus lucidus | Root | -- | 430.0 | -1.1 | * |
| Astragalus membranaceus | Root | 800.0 | 5000.0 | 1.3 | * |
| Atractylodes ovata | Rhizome | 760.0 | 960.0 | -0.7 | * |
| Atractylodes lancea | Rhizome | -- | 790.0 | -0.9 | * |
| Avena sativa | Plant | 2640.0 | 12000.0 | 2.5 | * |
| Avena sativa | Seed | 300.0 | 2900.0 | -0.0 | Jim Duke's personal files.* |
| Averrhoa carambola | Fruit | 80.0 | 1200.0 | -0.4 | * |
| Azadirachta indica | Leaf | -- | 7100.0 | 1.1 | * |