Table 6. Composition of vitamin mixture used for intensive culture of Atlantic salmon  (1 kg vitamin mixture/100 kg of feed)
Vitamin	Vitamin level1	Supplement and potency	Amount �
	(IU or mg/kg)		(g/100 kg)
Vitamin A	4 000 IU	Retinyl acetate, 500 000 IU/g	0.8
Vitamin D3	3 000 IU	Cholecalciferol, 500 000 IU/g	0.6
Vitamin E	150 IU	dl-alpha tocopheryl acetate, 500 IU/g	30
Vitamin K3	20 mg	Menadione sodium bisulfite, 33%	6.1
Thiamin	20 mg	Thiamin mononitrate, 92%	2.2
Riboflavin	15 mg	Riboflavin, 80%	1.88
Pantothenic acid	50 mg	d-calcium pantothenate, 90%	5.6
Biotin	0.5 mg	d-biotin, 2%	2.5
Folic acid	5  mg	Folic acid, 80%	0.63
Vitamin B12�	0.10 mg �	Vitamin B12 , 1%	1
Niacin	150 mg	Niacin, 100%	15
Pyridoxine	20 mg	Pyridoxine hydrochloride, 82%	2.44
Ascorbic acid	100 mg	Ascorbic acid monophosphate, 35%�	28.6
Inositol	100 mg	Inositol, 100%	10
Choline2	1.5 g	Choline chloride, 50%	300
Carrier			592.66
Total�			1,000
1Higher concentration of vitamin E and C may be used at certain stages of the life cycle to prevent diseases and stress and improve product quality
2Choline chloride is not incorporated in the vitamin mixture due to hygroscopic properties.�