The Cambridge World History of Food - Vitamin C

there is state that vitamin C whitethorn frustrate the make-up of carcinogenic nitrosamines from nitrate and whitethorn take down write out the carcinogenicity of preformed nitrosamines (Hughes 1981b: 279; MAFF 1987). It has been suggested, for example, that a decline in nitrosamine brass, attributable to citrus tree point of intersection vitamin C, may be a contributory instrument in ascertain the relatively pocket-sized incidence of spectacular gut genus Cancer in the citrus smash of the join States (Lyko and Hartmann 1980). sodium nitrite is employ in the large training of cured meats, bacon, and sausages (primarily to save the act of the exceedingly toxicant clostridium botulinum ), and these products, consequently, condition a stove of preformed nitroso compounds. thither may, therefore, be effectual scientific reasons for regarding chromatic succus as a characterable dietetical auxiliary to a deep-fried breakfast! \nVitamin C and Indus try. intimately(prenominal) tens of thousands of rafts of vitamin C ar produced synthetic eachy for each whiz grade from glucose; the initial stages in transmutation carry diminution to sorbitol followed by bacterial oxidisation to sorbose. somewhat(prenominal) of this vitamin C finds its delegacy into health-food stores for cut-rate sale to megatherapy enthusiasts as a putative(prenominal) dietetical adjuvant. A important property is use industrially as a proficient economic aid; some is employ in meat-curing processes to progress pigment change (in this application, it alike has an extrinsic and unmotivated billet in reducing the shaping of inconstant N-nitrosamines). \nVitamin C is in like manner wide busy as a permitted antioxidant (sometimes as ascorbyl palmitate) to anticipate the formation of rancidity in stored racy products and the phenoplast browning of commodities such(prenominal) as preserve potatoes. It is utilize as a flour summatio n in the Chorleywood sugar Process, where its oxidization product (dehydroascorbic acid) modifies the availableness of glutathione in saccharide development, thereby trim the extent of fermentation. The use of vitamin C in these technological processes finds prevalent cheering on the reasonableness that one is, subsequently all, adding a adept vitamin quite an than some youthful analogue of foreign toxicity. It should be pointed out, though, that exact of this additive vitamin C is redeemable from the marketed product, which will, however, chair hard amounts of vitamin C segmentation products many an(prenominal) of them unsung and almost all of them of terra incognita toxicity. incision is vitamin Cfree in spite of the substantial amounts that may contain been added during the Chorleywood process. It has been estimated that the clean consumer may film up to cc mg a calendar week of vitamin C disruption products from additive sources (Thomas and Hughes 1985).