All man-made chemicals are not bad. All natural chemicals are not good. However, if you have the choice of eating a meal cooked with fresh ingredients or one with an expiry date extending into the next millenium, you have to wonder how healthy the extra chemicals are.

Today, over 6,000 synthetic chemicals are officially condoned for use in the processed-food industry, including some that are known to have carcinogenic properties.

The human immune system correctly recognizes chemical food additives as toxic foreign agents and fights hard to rid the body of them, causing severe biochemical reactions and putting great stress on the immune system.

After years of daily exposure to such inorganic chemicals, the immune system finally breaks down and burns out, leaving the body vulnerable to attack by microbes, toxins, and cancerous cells.
hps-online.com

Ingredients for the "strawberry flavoring" in a Burger King milk shake, this doesn't include the ice cream or anything else:

Amyl acetate, amyl butyrate, amyl valerate, anethol, anisyl formate, benzyl acetate, benzyl isobutyrate, butyric acid, cinnamyl isobutyrate, cinnamyl valerate, cognac essential oil, diacetyl, dipropyl ketone, ethyl butyrate, ethyl cinnamate, ethyl heptanoate, ethyl lactate, ethyl methylphenylglycidate, ethyl Nitrate, ethyl propionate, ethyl valerbate, heliotropin, hydroxyphrenyl-2butanone (10% solution in alcohol), a-ionone, isobutyl anthranilate, isobutyl butrate, lemon essential oil, maltol, 4-methylacetophenone, methyl anthranilate, methyl benzoate, methyl cinnamate, methyl heptine carbonate, methyl naphthyl ketone, methyl salicylate, mint essential oil, neroli essential oil, nerolin, neryl isobutyrate, orris butter, phenethyl alcohol, rose, rum ether, g-undecalactone, vanillin, and solvent.
Eric Schlosser: Fast Food Nation