1 / 4

Water-Soluble Vitamins

Water-Soluble Vitamins. Water soluble Readily excreted – expensive urine Can be lost from food by cooking/storage Typically work as part of enzymes in metabolism Relatively high absorption rate Severe deficiencies rare Vitamins – Niacin, Thiamine, Folic Acid, Riboflavin, B12, and C.

oakes
Télécharger la présentation

Water-Soluble Vitamins

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Water-Soluble Vitamins • Water soluble • Readily excreted – expensive urine • Can be lost from food by cooking/storage • Typically work as part of enzymes in metabolism • Relatively high absorption rate • Severe deficiencies rare • Vitamins – Niacin, Thiamine, Folic Acid, Riboflavin, B12, and C.

  2. Enrichment Act of 1941 and 1998 • Milling of rice, wheat, oats, etc… • significantly reduces nutritional quality • Whole grains contain original nutrients • Enrich with • thiamin, riboflavin, niacin, folate, iron • Enriched grains still • deficient in B-6, magnesium and zinc

  3. Thiamin • Destroyed by alkaline and heat • Coenzyme: Thiamin pyrophosphate (TPP) • Absorbed in the jejunum by a carrier-mediated system • Transported by RBC in the blood • Deficiency • Beriberi • Weakness, nerve degeneration, irritability, poor arm/leg coordination, loss of nerve transmission • Edema, enlarge heart, heart failure

  4. Food Sources of Thiamin • Wide variety of food • White bread, pork, hot dogs, luncheon meat, cold cereal • Enriched grains/ whole grains • Thiaminase found in raw fish • 1.1 mg/day for women • 1.2 mg/day for men • Most exceed RDA in diet • Surplus is rapidly lost in urine; non toxic

More Related