| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Salix alba | Bark | -- | 2820.0 | 0.4 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Salvia officinalis | Leaf | -- | 3420.0 | 0.6 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Schisandra chinensis | Fruit | -- | 4020.0 | 0.5 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Sclerocarya caffra | Seed | 6040.0 | 6290.0 | 1.1 | * |
| Sclerocarya caffra | Fruit | 300.0 | 3610.0 | -0.1 | * |
| Scutellaria lateriflora | Plant | -- | 3140.0 | -0.1 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Secale cereale | Seed | 3350.0 | 3760.0 | -0.9 | USDA's Ag Handbook 8 and sequelae) |
| Sechium edule | Fruit | 240.0 | 3430.0 | -0.4 | * |
| Sesamum indicum | Plant | -- | 6700.0 | 3.1 | * |
| Sicana odorifera | Fruit | 430.0 | 3410.0 | -0.4 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Sida rhombifolia | Leaf | 630.0 | 3180.0 | 0.3 | * |
| Solanum torvum | Fruit | 470.0 | 3220.0 | -0.7 | * |
| Solanum melongena | Leaf | 150.0 | 2790.0 | -0.4 | * |
| Solanum quitoensis | Fruit | 230.0 | 3460.0 | -0.3 | * |
| Solanum tuberosum | Tuber | 780.0 | 3755.0 | 0.4 | * |
| Solanum melongena | Fruit | 250.0 | 3370.0 | -0.4 | * |
| Sonchus oleraceus | Leaf | 180.0 | 2650.0 | -0.6 | * |
| Sphenostylis stenocarpa | Root | 1290.0 | 3660.0 | 0.6 | * |
| Sphenostylis stenocarpa | Seed | 3500.0 | 3860.0 | -0.8 | * |
| Spinacia oleracea | Plant | 220.0 | 2613.0 | -0.6 | USDA's Ag Handbook 8 and sequelae) |