EQN 4020 Lecture 3: EQN4020 - Notes 2

• School: University of Guelph
• Department: Equine
• Course: EQN 4020
• Professor: Anna- Kate Shoveller

Document Summary

Fat soluble: a, d, e, k, need fat coming in to absorb these vitamins (or absorption will impaired, potential toxicity body stores these vitamins and can accumulate and lead to toxicity. Water soluble: b1 (thiamin), b2 (riboflavin), b3 (niacin), b5 (pantothenic acid), b6 (pyridoxine), b7 (biotin), b9 (folic acid), b12, c, be(cid:272)ause the(cid:455) a(cid:396)e (cid:374)ot sto(cid:396)ed i(cid:374) adipose tissue (cid:449)e a(cid:396)e(cid:374)(cid:859)t (cid:272)o(cid:374)(cid:272)e(cid:396)(cid:374)ed a(cid:271)out to(cid:454)i(cid:272)it(cid:455) Preventing deficiencies vs. other effects (different levels of requirements) Function: vision (rhodopsin, maintenance of epithelial membranes, reproduction (acts as a morphogenic agent, b-carotene is an effective antioxidant. Requirements: covered with pasture access and good quality hay, research shows horses given 4-6 weeks access to great pasture can store up enough b-carotene to last. 3-8 months of winter: horse is getting most of it through b-carotene and converting to vitamin a. Is a conversion 33% b-carotene is converted (slightly inefficient)