Textbook Notes (369,203)
United States (206,225)
Nutrition (22)
NTR 306 (22)
Chapter 10

NTR 306 Chapter 10 Water Soluble Vitamins Notes.docx

7 Pages
76 Views

Department
Nutrition
Course Code
NTR 306
Professor
Deanna Staskel

This preview shows pages 1 and half of page 2. Sign up to view the full 7 pages of the document.
Description
Chapter 10: Water Soluble Vitamins Classification of vitamins:  Based on solubility o 9 water-soluble: B vitamin complex and vitamin C  Digesting and absorbing water-soluble vitamins  o 4 fat-soluble: vitamins A, D, E and K  Solubility influences a vitamin’s o Digestion o Absorption o Transportation o Storage o Excretion  VITAMIN C:  Also known as ascorbic acid  Water-soluble vitamin  Unlike most mammals, humans don’t have the ability to make their own vitamin C o Must obtain through diet [ESSENTIAL VITAMIN] Chapter 10: Water Soluble Vitamins  RDA for adults o Males – 90 mg/d o Females – 75 mg/d o Smokers – an additional 35 mg/d o Upper limit – 2000 mg/d  Toxicity – consuming too much can cause o Nausea o Stomach cramps o Diarrhea  PLANT SOURCES are the major food sources  Major functions o Collagen formation  Key protein in our connective tissues, cartilage and tendons o Antioxidant  Regenerates other antioxidants  Like vitamin E  Can protect from damage by free radicals and reactive oxygen species  Can be generated during normal metabolism and through exposure to toxins and pollutants o Iron absorption o Immune system o Synthesis of carnitine  Essential for the transport of fat to mitochondria, for conversion to energy o Synthesis of the neurotransmitter, norepinephrine  Critical to brain function and are known to affect mood  ROLE  o  Scurvy – weakening of blood vessels, connective tissue and bone, which contain collagen o Symptoms: bleeding and bruising easily, hair and tooth loss, joint pain and swelling  Deficiencies of vitamin C o Scorbutic gums – mouth lesion o Pinpoint hemorrhages – small red spots appear in the skin, indicating spontaneous bleeding internally Chapter 10: Water Soluble Vitamins B Vitamins: 8 B-Vitamins:  Vitamin B1 (thiamin) o RDA for adults  Males – 1.2 mg/d  Females – 1.1 mg/d o Toxicity – NONE KNOWN o Sources of thiamin       o Major functions  Synthesis of DNA and RNA  Vital part of thiamin pyrophosphate [coenzyme that is important for energy metabolism o Deficiencies  Beriberi  Symptoms: o Loss of appetite o Weight loss o Confusion o Muscle weakness o Peripheral neuropathy  Classifications: o Wet – edema and congestive heart failure o Dry – muscle wasting without edema or nerve degeneration  Vitamin B2 (riboflavin) o RDA for adults  Males – 1.3 mg/d  Females – 1.1 mg/d o Toxicity – NONE KNOWN o Functions  Maintenance of the integrity of the membranes of the skin, eyes and GI tract  major function: part of the coenzyme [energy metabolism]  Flavin adenine dinucleotide (FAD)  Or flavin mononucleotide (FMN) o Deficiencies  Ariboflavinosis – cells in tissues lining the throat, mouth, tongue and lips becomes inflamed or swollen  Sore throat  Stomatitis  Glossitis  Cheilosis Chapter 10: Water Soluble Vitamins  Vitamin B3 (niacin) o Major food sources  Body manufacturers from tryptophan  Only occurs after protein synthesis needs have been met  Lean meats  Grains and cereals o RDA for adults  Males – 16 mg/d  Females – 14 mg/d  Upper level – 35 mg/d o Toxicity  NONE KNOWN from normal dietary intake  Excess supplements or too many overly fortified foods  “Niacin Flush” o Reddish coloring of the face, arms and chest  Nausea, vomiting, heartburn  Possibel from prolonged use of high doses  Liver toxicity  Riased blood glucose levels o Major functions  In therapeutic doses  Lowers total cholesterol in the blood  Lowers triglycerides  Raises HDL cholesterol  2 active coenzyme forms (metabolic reactions)  Nicotinamide adenine dinucleotide (NAD )
More Less
Unlock Document

Only pages 1 and half of page 2 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit