Natural vs. Synthetic Sources of Supplements

Vitamin Name

if source given is only:

it is:

Vitamin C

Rose hips, acerola, citrus fruits, green peppers

Natural

Vitamin C

Ascorbic Acid* or if source not given

(*only a portion of the whole vitamin C molecule)

Synthetic

Vitamin B-complex

Brewer’s yeast

Natural

Vitamin B-complex

if source is not given

Synthetic

Vitamin B1 - Thiamin

Yeast or rice bran

Natural

Vitamin B1

Thiamine Hydrochloride, Thiamine Chloride or Thiamine Mononitrate

Synthetic

Vitamin B2 - Riboflavin

Yeast or rice bran

Natural

Vitamin B2 - Riboflavin

Riboflavin

Synthetic

Vitamin B6 - Pyridoxine

Yeast or rice bran

Natural

Vitamin B6 - Pyridoxine

Pyridoxine Hydrochloride

Synthetic

Vitamin B3 - Niacin

Yeast or rice bran

Natural

Niacin or Niacinamide

if source is not given

Synthetic

Vitamin B12 - Cobalamin

Yeast, liver or fermentation concentrate

Natural

Vitamin B12 - Cobalamin

Colalamin or Cyanocobalamin

Natural

PABA

Yeast

Natural

PABA

if source is not given

Synthetic

Folic Acid

Yeast

Natural

Folic Acid

Pteroylglutamic acid or if source is not given

Synthetic

Pantothenic Acid

Yeast

Natural

Pantothenic Acid

Calcium Pantothenate

Synthetic

Inositol

Soy beans, corn or yeast

Natural

Choline

Soy beans or yeast

Natural

Choline

Choline Bitartrate

Synthetic

Biotin

Yeast

Natural

Biotin

d-biotin

Synthetic

Vitamin A

Fish oils or lemon grass

Natural

Vitamin A

Acetate or Palmate

Synthetic

Vitamin D or D3

Fish oils

Natural

Vitamin D or D3

Irradiated Ergosterol or Calciferol

Synthetic

Vitamin E

Vegetable oils, wheat germ, mixed tocopherols

Natural

Vitamin E

d-alpha tocopherol or tocopheryl acetate

Natural    

Vitamin E

Alpha tocopherol acetate or dl-alpha tocopherol (or tocopheryl) acetate

Synthetic

Vitamin E

Succinate

Can be natural or synthetic

Vitamin K

Alfalfa

Natural

Vitamin K

Menadione 

Synthetic

Vitamin P or Bioflavinoids 

Citrus Bioflavinoids, rutin, hesperidin, citrin 

Natural

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