Vitamin A (50% as beta-carotene is derived from the plant pathogen, Blakeslea trispora.
The vitamin A (as retinyl palmitate), vitamin B12, vitamin D, thiamine, niacin, biotin, pantothenic acid, riboflavin, folate (as Quatrefolic® 6(S)-5-methyltetrahydrofolate, glucosamine salt, calcium folinate), calcium, zinc, vitamin B6, iron, chromium, magnesium, selenium, potassium, manganese, molybdenum, choline, boron, inositol, and vanadium are synthetic.
Vitamin C (as ascorbic acid) is derived from corn.
Vitamin E (as d-alpha tocopheryl succinate, mixed tocopherols) is derived from soy (Optimal Multivitamin Powder is tested and confirmed to be free of soy allergens).
Vitamin K (as menaquinone 7) is derived from natto (Optimal Multivitamin Powder is tested and confirmed to be free of soy allergens).
Iodine is from potassium iodide and organic Icelandic kelp (Laminaria digitate).
The lutein and zeaxanthin are from marigold flower extract (Tegetes erecta).