We should all avoid the toxins in "E numbers" but be careful of shunning the whole group, as they are not all bad. Make a note, as these ones are safe and potentially beneficial:

• E101 Riboflavin
• E160 Carotene
• E300/E304, Vitamin C
• E306/E309, Vitamin E
• E375 Nicotinic acid and Vitamin B3
• E440 Pectin

Source:

Article by TV's Diet Doctors, Dr. Wendy Denning and Vicki Edgson, Naturopath and nutritionist.
Women and Home, February 2006,