| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Ammi visnaga | Plant | -- | -- | * | |
| Amphicarpaea bracteata | Seed | 650.0 | 2560.0 | -0.5 | * |
| Anacardium occidentale | Seed | 17725.0 | 102000.0 | 1.6 | * |
| Anamirta cocculus | Seed | 52250.0 | 85500.0 | 1.3 | * |
| Ananas comosus | Fruit | 110.0 | 815.0 | -0.2 | USDA's Ag Handbook 8 and sequelae) |
| Anethum graveolens | Fruit | 1000.0 | 1083.0 | -0.2 | * |
| Anethum graveolens | Seed | 1000.0 | 1083.0 | -0.5 | USDA's Ag Handbook 8 and sequelae) |
| Angelica archangelica | Fruit | -- | -- | * | |
| Angelica sinensis | Root | -- | -- | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. | |
| Angelica archangelica | Plant | -- | -- | Pakistan Encyclopedia Planta Medica. 1986. | |
| Annona reticulata | Plant | -- | -- | * | |
| Annona muricata | Plant | -- | -- | * | |
| Apium graveolens | Pt | 30.0 | 560.0 | USDA's Ag Handbook 8 and sequelae) | |
| Apium graveolens | Seed | 3100.0 | 5000.0 | -0.5 | USDA's Ag Handbook 8 and sequelae) |
| Aquilegia vulgaris | Seed | -- | 5100.0 | -0.5 | * |
| Arachis hypogaea | Seed | 10980.0 | 13760.0 | -0.3 | * |
| Arctium lappa | Root | -- | -- | Leung, A. Y. and Foster, S. 1995. Encyclopedia of Common Natural Ingredients 2nd Ed. John Wiley & Sons, New York. 649 pp. | |
| Arctium lappa | Plant | -- | -- | * | |
| Areca catechu | Seed | -- | -- | * | |
| Arnica montana | Flower | -- | -- | * |