E

Echinacea

(30-100 mg/kg per day) on spontaneous apoptosis after 18 h

in vitro

cultivation. Values are means of at least seven determinations

±

SEM. ***

p

<

0.001 versus control. (From Carlo et al.,

Pharmacol. Res.,

48:273-277, 2003. With permission.)

problem to be solved before further clinical trials can be carried out.