Vitaminas Verdadeiras e as de Imitação?

As vitaminas baratas são estas coisas feitas de petróleo?
Veja como são feitas estas imitações de vitaminas sintéticas, baratas e as verdadeiras. E onde as pode encontrar.
Are we killing ourselves with the cheap Synthetic vitamins developed from the pharmaceutical industry?
Have a look ! 
"Chemical Form of Food and Non-Food Vitamins"
Vitamin A/Betacarotene
(Carrots)
Methanol, benzene, petroleum esters; acetylene; refined oils
Vitamin B-1
(Nutritional yeast, rice bran
Coal tar derivatives, hydrochloric acid; acetonitrole with ammonia
Vitamin B-2

Nutritional yeast, rice bran
Synthetically produced with 2N acetic acid
Vitamin B-3
Nutritional yeast, rice bran
Coal tar derivatives, 3-cyanopyridine; ammonia and acid
Vitamin B-5
Nutritional yeast, rice bran
Condensing isobutyraldehyde with formaldehyde
Vitamin B-6
Nutritional yeast, rice bran
Petroleum ester & hydrochloric acid with formaldehyde
Vitamin B-8
Rice
Phytin hydrolyzed with calcium hydroxide and sulfuric acid
Vitamin B-9
Broccoli, rice bran
Processed with petroleum derivatives and acids; acetylene
Vitamin B-12
Nutritional yeast
Cobalamins reacted with cyanide
Vitamin ‘B-x’
PABA Nutritional yeast
Coal tar oxidized with nitric acid (from ammonia)
Choline
Nutritional yeast, rice bran
Ethylene and ammonia with HCL or tartaric acid
Vitamin C
Acerola cherries, citrus fruits
Hydrogenated sugar processed with acetone
Vitamin D
Nutritional yeast
Irradiated animal fat/cattle brains or solvently extracted
Vitamin E
Rice, vegetable oils
Trimethylhydroquinone with isophytol; refined oils
Vitamin H
Nutritional yeast, rice bran
Biosynthetically produced
Vitamin K
Cabbage
Coal tar derivative; produced with p-allelic-nickel