“Vitamin D helps your body absorb calcium
and phosphorus, which are needed for bone development
and strength. It’s also important for…”.1

Definition

What is vitamin D?

Depending on the Source (DotS) the definition of vitamin D may vary. The (United States) Office of Dietary Supplements’ (ODS) definition is:

“Vitamin D helps your body absorb calcium and phosphorus, which are needed for bone development and strength. It’s also important for cell growth, a healthy immune system, hormone function and nervous system regulation”.2

Role

What does Vitamin D do?

In Important Nutrients At Different Life Stages: Vitamin D according to the (Australian) Jean Hailes for Women’s Health (JH):

“Vitamin D helps your body absorb calcium and phosphorus, which are needed for bone development and strength. It’s also important for cell growth, a healthy immune system, hormone function and nervous system regulation”.3

Sources of Vitamin D

What are sources of vitamin D?

In Vitamin D: What Foods Provide Vitamin D? the ODS explain:

“Very few foods naturally contain vitamin D. Fortified foods provide most of the vitamin D in the diets of people in the United States. Check the Nutrition Facts label for the amount of vitamin D in a food or beverage.

  • Almost all of the U.S. milk supply is fortified with about 3 mcg (120 IU) vitamin D per cup. Many plant-based alternatives such as soy milk, almond milk, and oat milk are similarly fortified. But foods made from milk, like cheese and ice cream, are usually not fortified
  • Vitamin D is added to many breakfast cereals and to some brands of orange juice, yogurt, margarine, and other food products
  • Fatty fish (like trout, salmon, tuna, and mackerel) and fish liver oils are among the best natural sources of vitamin D
  • Beef liver, egg yolks, and cheese have small amounts of vitamin D
  • Mushrooms provide a little vitamin D. Some mushrooms have been exposed to ultraviolet light to increase their vitamin D content”.4

Daily

How much vitamin D should women over 50, aim for daily?

DoY (Depending on You) and DotS this may vary. It can therefore be in your best interest to choose to check what’s-what for you.

Sun

What is the association between the sun and vitamin D?

The ODS explain:


“Your body makes vitamin D when your bare skin is exposed to the sun. Most people get at least some vitamin D this way. However, clouds, smog, old age, and having dark-colored skin reduce the amount of vitamin D your skin makes. Also, your skin does not make vitamin D from sunlight through a window.

Ultraviolet radiation from sunshine can cause skin cancer, so it’s important to limit how much time you spend in the sun. Although sunscreen limits vitamin D production, health experts recommend using sunscreen with a sun protection factor (SPF) of 15 or more when you’re out in the sun for more than a few minutes”.5

Calcium

What is the association between calcium and vitamin D?

On page one in Calcium and Calcium Supplements: Achieving the Right Balance – Calcium and Diet the (United States) Mayo Clinic elaborate on:

“To absorb calcium, your body also needs vitamin D. A few foods naturally contain small amounts of vitamin D, such as canned salmon with bones and egg yolks. You can also get vitamin D from fortified foods and sun exposure”.6

Vitamin D Supplements

What do the authors conclude about vitamin D supplements Women’s Health Initiative Randomized Trials and Clinical Practice?

In The Women’s Health Initiative Randomized Trials and Clinical Practice: Abstract – Conclusions and Relevance, published 01 May 2024, the authors conclude:

“The WHI evidence does not support routine supplementation with calcium plus vitamin D for menopausal women to prevent fractures or a low-fat diet with increased fruits, vegetables, and grains to prevent breast or colorectal cancer”.7

Health Care Provider

What if I think I need to take a vitamin D supplement?

If you think you need to take a vitamin D supplement, it may be in your best interest to choose to talk to your health care provider about this.

In Healthy Bones: How To Maintain Bone Health – Vitamin D the JH explain:

“It’s hard to get the right amount of vitamin D from diet alone, so if your vitamin D levels are low, talk to your doctor about taking supplements”.8

Health Topics A-Z

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Links

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Sources

Where may I find the Sources quoted?

You may find the Sources quoted:

Sources

  1. Important Nutrients At Different Life Stages: Vitamin D. Last Updated: 09 October 2024 | Last Reviewed: 24 January 2024. Jean Hailes for Women’s Health https://www.jeanhailes.org.au/health-a-z/healthy-living/important-nutrients-at-different-life-stages#vitamin-d Accessed: 02 December 2024
  2. Vitamin D: What Is Vitamin D and What Does It Do? Updated: 08 November 2022. Office of Dietary Supplements https://ods.od.nih.gov/factsheets/VitaminD-Consumer/ Accessed: 02 December 2024
  3. Important Nutrients At Different Life Stages: Vitamin D. Last Updated: 21 April 2024 | Last Reviewed: 24 January 2024. Jean Hailes for Women’s Health https://www.jeanhailes.org.au/health-a-z/healthy-living/important-nutrients-at-different-life-stages#vitamin-d Accessed: 02 December 2024
  4. Vitamin D: What Foods Provide Vitamin D? Updated: 08 November 2022. Office of Dietary Supplements https://ods.od.nih.gov/factsheets/VitaminD-QuickFacts/#h6 Accessed: 02 December 2024
  5. Vitamin D: Can I Get Vitamin D From the Sun? Updated: 08 November 2022. Office of Dietary Supplements https://ods.od.nih.gov/factsheets/VitaminD-Consumer/ Accessed: 02 December 2024
  6. Calcium and Calcium Supplements: Achieving the Right Balance – Calcium and Diet. 01 November 2022. Mayo Clinic https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/calcium-supplements/art-20047097 Accessed: 02 December 2024
  7. Manson, J.A, E. Crandall, C. J., Rossouw, J. E. et al. The Women’s Health Initiative Randomized Trials and Clinical Practice: Abstract – Conclusions and Relevance. 01 May 2024 https://jamanetwork.com/journals/jama/ Accessed: 02 December 2024
  8. Healthy Bones: How To Maintain Bone Health – Vitamin D. Last Updated: 25 September 2024 | Last Reviewed: 11 October 2023. Jean Hailes for Women’s Health https://www.jeanhailes.org.au/health-a-z/bone-health/healthy-bones Accessed: 02 December 2024
Topic Last Updated: 27 December 2024 – Topic Last Reviewed: 02 December 2024