1. A fat or oil composition comprising a derivative of vitamin B1 or its salt is in the range from 44 to 8000 ppm based on the thiamine with a hydroxyl number in the range from 9 to 100 mg-KOH / g, wherein the C content (ppm ) derivative of vitamin B1 or its salt based on the thiamine with a hydroxyl value X (mg-KOH / g) satisfies the relationship shown in the following expression (1): [Ln (C / 143)] / X≤0,044 (1), where Ln represents a natural logarifm.2. A fat or oil composition according to claim 1, wherein the C content (ppm) of vitamin B1 derivative or a salt thereof, based on the hydroxyl number thiamine X (mg-KOH / g) satisfies the relationship shown in the following expression (2) : [Ln (C / 82)] / X≤0,04 (2) wherein Ln represents the natural logarifm.3. A fat or oil composition according to claim 1, wherein the derivative of vitamin B1 include bisbentiamina disulfid.4. A fat or oil composition according to claim 1, comprising diacylglycerols within the range of 10 to 99% mass.5. A fat or oil composition according to claim 1, further comprising vitamin C, a derivative thereof or nikotinamid.6. A fat or oil composition comprising nicotinamide ranging from 1,000 to 20,000 ppm with a hydroxyl number in the range from 9 to 100 mg-KOH / g, wherein the C content (ppm) of nicotinamide with a hydroxyl value X (mg-KOH / g) satisfies the relationship shown in the following expression (3): [Ln (C / 850)] / X≤0,038 (3), where Ln represents the natural logarifm.7. A fat or oil composition according to claim 6, wherein the C content (ppm) of nicotinamide with a hydroxyl value X (mg-KOH / g) satisfies the relationship shown in the following expression (4): [Ln (C / 679)] / X≤0,039) (4) where Ln represents at1. Жировая или масляная композиция, включающая производное витамина B1 или его соль в пределах от 44 до 8000 частей на миллион в пересчете на тиамин с гидроксильным числом в пределах от 9 до 100 мг-KOH/г,в которой содержание С (частей на миллион) от производного витамин
