| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Solanum melongena | Fruit | 85.0 | 1563.0 | -0.3 | * |
| Solanum tuberosum | Tuber | 190.0 | 4250.0 | 2.2 | * |
| Sophora subprostrata | Root | -- | 1880.0 | -0.4 | * |
| Sophora angustifolia | Root | 2140.0 | 3720.0 | 0.6 | * |
| Sorbus aucubaria | Fruit | 190.0 | 1190.0 | -0.4 | * |
| Spinacia oleracea | Plant | 420.0 | 11000.0 | 2.2 | * |
| Spirulina spp. | Plant | -- | 2550.0 | -0.5 | * |
| Spirulina pratensis | Plant | -- | 2550.0 | -0.5 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Spondias tuberosa | Fruit | -- | 90.0 | -0.9 | * |
| Spondias dulcis | Seed | -- | 1200.0 | -0.7 | * |
| Spondias dulcis | Fruit | 48.0 | 240.0 | -0.9 | * |
| Stachys officinalis | Plant | 185.0 | 1100.0 | -0.9 | * |
| Stellaria media | Plant | 439.0 | 5290.0 | 0.4 | * |
| Stevia rebaudiana | Leaf | -- | 3490.0 | -0.2 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Stevia rebaudiana | Plant | -- | 2890.0 | -0.4 | Kinghorn, A. D. (Ed.) 2002. Medicinal and Aromatic Plants - Industrial Profiles. Stevia. The genus Stevia. Taylor & Francis. New York, NY. 211 pp. |
| Symphoricarpos orbiculatus | Stem | 380.0 | 8800.0 | 1.7 | * |
| Symphytum officinale | Leaf | 77.0 | 700.0 | -1.3 | * |
| Symphytum officinale | Root | -- | 1700.0 | -0.5 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Syzygium aromaticum | Fruit | 2640.0 | 3020.0 | 0.4 | * |
| Syzygium cumini | Fruit | 350.0 | 2145.0 | 0.0 | Morton, J.F., Major Medicinal Plants. 1977. Atlas of Medicinal Plants of Middle America. Bahamas to Yucatan. 1981. |