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Nutrition Through the Life Cycle (...

6th Edition
Judith E. Brown
ISBN: 9781305628007

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BuyFindarrow_forward

Nutrition Through the Life Cycle (...

6th Edition
Judith E. Brown
ISBN: 9781305628007
Textbook Problem

Which of the following is considered a risk factor for low vitamin D status?

  1. a. Dark skin pigmentation
  2. b. Light skin pigmentation
  3. c. Low calcium intake
  4. d. High calcium intake

Summary Introduction

Introduction: Vitamin D is an essential nutrient that is required by the body for the absorption of calcium. It is present naturally in egg yolk, sea food, and milk. Our body can also synthesize vitamin D using sunlight, mainly from the cholesterol in body. Vitamin D also has roles in immune, muscular and nervous systems. Deficiency of vitamin D can lead to osteoporosis.

Explanation

Reason for the correct answer:

Option a. is given as “Dark skin pigmentation”

Dark colored skin is associated with higher melanin levels in the skin which leads to decreased ultraviolet (UV) B absorption in these individuals. Therefore, endogenous synthesis of vitamin D through UV-B is reduced in dark skin pigmentation leading to increased risk for low vitamin D status.

Hence, option a. is correct.

Reasons for the incorrect answer:

Option b. is given as “Light skin pigmentation”

Light skin pigmentation is not a risk factor for low vitamin D status because such individuals do not have excess melanin pigmentation in their skin and therefore, their skin can synthesize vitamin D from sunlight...

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