| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Viola tricolor | Plant | -- | -- | * | |
| Trigonella foenum-graecum | Plant | -- | -- | * | |
| Trigonella foenum-graecum | Seed | -- | -- | * | |
| Tragopogon porrifolius | Plant | -- | -- | * | |
| Stellaria media | Shoot | -- | -- | * | |
| Passiflora incarnata | Plant | -- | -- | Gruenwald, J. et al. 1998. PDR for Herbal Medicine. 1st ed. Medical Economics Co., Montvale, NJ. 1244 pp. (abbreviated as PHR or Physicians Herbal Reference in my mind) | |
| Ocimum tenuiflorum | Plant | -- | -- | * | |
| Ocimum basilicum | Leaf | -- | -- | * | |
| Marrubium vulgare | Leaf | -- | -- | * | |
| Marrubium vulgare | Plant | -- | -- | * | |
| Linum usitatissimum | Leaf | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Ephedra nevadensis | Shoot | -- | -- | Jim Duke's personal files. | |
| Crataegus monogyna | Flower | -- | -- | * | |
| Crataegus monogyna | Leaf | -- | 3.0 | * | |
| Citrus limon | Pericarp | -- | -- | Jim Duke's personal files. | |
| Ballota nigra | Shoot | -- | -- | Seidel, V., Verholle, M., Malard, Y., Tillequin, F., Fruchart, J-C., Duriez, P., Bailleul, F., Teissier, E. 2000. Phenylpropanoids from Ballota nigra L. Inhibit in vitro LDL Peroxidation. Phytotherapy Research, 14(2): 93-98. | |
| Artemisia herba-alba | Plant | -- | -- | * |