| Active Ingredient | Uses based on scientific evidence | Grade* |
| soy (glycine max [l. merr.)] | early research suggests that intake of soy products may be associated with a reduced risk of death from stomach cancer. further investigation is needed before a conclusion can be drawn. | c |
*Key to grades
A: Strong scientific evidence for this use;
B: Good scientific evidence for this use;
C: Unclear scientific evidence for this use;
D: Fair scientific evidence against this use;
F: Strong scientific evidence against this use.