NR 228 Exam 2 Outlines and Review Week 4 Outline: Chapters 7. 8. And 17 What are vitamins? • Organic molecules needed in very small amounts for cellular metabolism • Perform specific metabolic functions Water Soluble Vitamins o Dissolve in water & are readily available o Not stored in our body o Excess water-soluble vitamins are quickly excreted in urine. They do not accumulate and become toxic o Vitamin C taken in excess can cause diarrhea Vitamin B1 (thiamine)  Use: he...