Table 2.

Influence of varying levels of vitamins C and E on β-carotene-modulated tumor multiplicity (average number of tumors per animal at median tumor time).

Control (−βCar) a	(+βCar) b	(+βCar, −Vit C) c	(+βCar, −Vit C, low Vit E) d
1.05	3.20	3.45	5.90

^a Control, semi-defined diet containing 110 mg vitamin E and 990 mg vitamin C/kg of diet; ^b (+βCar): semi-defined diet containing 0.79g/kg diet of β-carotene with equivalent levels of vitamins C and E as Control; ^c (+ βcar, −Vit C): same composition as + βCar but with no vitamin C; ^d (+βCar, −Vit C, low Vit E): same composition as +βCar, −Vit C but with only 49 mg/kg diet of vitamin E, the same as in closed-formula ration [79]. (Reprinted by permission of the publisher Taylor and Francis, Ltd., http://tandfonline.com).