| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Arctium lappa | Root | 20.0 | 85.0 | -0.6 | * |
| Arctostaphylos uva-ursi | Leaf | 22.0 | 191.0 | -0.4 | * |
| Areca catechu | Seed | -- | -- | * | |
| Armoracia rusticana | Plant | 1220.0 | 18200.0 | 3.7 | * |
| Armoracia rusticana | Root | 1800.0 | 10000.0 | 5.1 | * |
| Armoracia rusticana | Leaf | 2440.0 | 4560.0 | -0.0 | * |
| Arracacia xanthorrhiza | Root | 310.0 | 1070.0 | -0.0 | * |
| Artemisia absinthium | Leaf | 1200.0 | 2600.0 | -0.2 | * |
| Artemisia vulgaris | Leaf | 720.0 | 5670.0 | 0.1 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Artemisia dracunculus | Leaf | -- | 588.0 | -0.4 | * |
| Artocarpus altilis | Fruit | 150.0 | 985.0 | -0.2 | * |
| Artocarpus heterophyllus | Fruit | 45.0 | 435.0 | -0.3 | * |
| Artocarpus altilis | Seed | 65.0 | 275.0 | -0.2 | * |
| Asimina triloba | Fruit | 76.0 | 893.0 | -0.2 | * |
| Aspalathus linearis | Shoot | 157.0 | 94000.0 | 4.2 | * |
| Asparagus officinalis | Root | 398.0 | 3976.0 | 1.6 | * |
| Asparagus officinalis | Shoot | 100.0 | 5714.0 | -0.1 | * |
| Astragalus membranaceus | Root | -- | -- | * | |
| Avena sativa | Plant | 26.0 | 120.0 | -0.6 | * |
| Averrhoa bilimbi | Fruit | 160.0 | 4665.0 | 0.0 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |