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Vitamin D isn’t just another nutrient — it’s a powerful hormone your body makes when sunlight hits your skin. That’s why it’s often called the “sunshine vitamin.”

But here’s the challenge: Many people don’t get enough sunlight or vitamin D-rich foods, which makes deficiency very common. Studies suggest over 40% of Americans have low levels. (Forrest & Stuhldreher, 2011).


Why Vitamin D Is So Important

Vitamin D does more than support bone strength. It acts like a hormone, influencing multiple systems in the body.

  • Bone and Muscle Health: Vitamin D helps the body absorb calcium and phosphorus, two minerals essential for bone strength and muscle function. A lack of vitamin D increases the risk of osteoporosis and fractures, especially in older adults [(Holick, 2007, New England Journal of Medicine)].
  • Immune Function: Adequate vitamin D levels support the immune system, reducing the risk of respiratory infections and autoimmune conditions
  • Mood and Brain Health: Research links vitamin D deficiency with a higher risk of depression and cognitive decline.
  • Sleep Support:: Vitamin D is proven to provide better sleep quality (“The world epidemic of sleep disorders is linked to vitamin D deficiency” – Gominak & Stumpf, 2012).

Common Sources of Vitamin D

Since few foods naturally contain vitamin D, sunlight and supplementation often play the biggest role in maintaining healthy levels.

  • Sunlight: The body can produce vitamin D after 10–30 minutes of midday sun exposure on the skin, depending on skin tone, location, and season [(Holick, 2007, NEJM)].
  • Foods: Fatty fish (salmon, sardines, mackerel), egg yolks, and fortified foods such as milk, orange juice, and cereals provide vitamin D.
  • Supplements: Vitamin D3 (cholecalciferol) is more effective at raising blood levels than vitamin D2 (ergocalciferol).

How Much Vitamin D Do You Need?

The recommended dietary allowance (RDA) varies by age:

  • Adults under 70: 600 IU per day
  • Adults over 70: 800 IU per day
  • Some experts suggest higher levels (1,000–2,000 IU daily) may be beneficial for certain populations.

Blood tests are the best way to determine vitamin D status.


Risks of Deficiency

A lack of vitamin D can lead to:

  • Rickets in children, a condition causing bone weakness and deformities
  • Osteoporosis and fractures in adults
  • Higher risk of infections, fatigue, and mood disorders

People at higher risk include those with darker skin, limited sun exposure, older adults, and individuals with digestive disorders that reduce nutrient absorption.

Key Nutrients That Work With Vitamin D

Vitamin D works best with these other nutrients:

  • Magnesium – supports vitamin D metabolism.
  • Vitamin A – balances fat-soluble vitamin intake (naturally found in cod liver oil, along with vitamin D).

Final Thoughts

Vitamin D is more than just a nutrient — it’s a foundation for bone health, immune strength, and mood improvement. If you’re not getting enough from sunlight and food, supplementation can help fill the gap.

FAQ – Frequently Asked Questions

Q: Can I get enough vitamin D from food alone?
A: It’s possible, but difficult. Fatty fish and fortified foods help, but most people still need sunlight or supplements.

Q: Is too much vitamin D harmful?
A: Yes. Excess vitamin D can cause calcium buildup in the blood, leading to kidney and heart issues. Stick to safe daily limits unless advised otherwise by a professional.

Q: Does sunscreen block vitamin D production?
A: Sunscreen can reduce vitamin D synthesis. Moderate sun exposure without burning usually provides enough.

Q: Should I take vitamin D2 or D3?
A: Vitamin D3 is generally more effective at raising blood levels, though both can be beneficial.

Nutrition Breakthroughs

This natural health news is provided by Nutrition Breakthroughs, a publisher of nutrition articles and supplier of effective natural remedies since 2002. Nutrition Breakthroughs makes Sleep Minerals II, the effective natural sleep aid with calcium, magnesium, zinc and vitamin D.

Suzanne G. of Tucson, Arizona says: “I am now taking two Sleep Mineral II capsules each night. I have had insomnia for most of my life and the longer I take Sleep Minerals, the better I sleep. The best thing is that I can now get back to sleep if I wake up in the night. It has given me such a sense of peace to know that I now can be well rested during the day.. I have tried many products on the market and this is the one that is gold. Thank you so much for producing a quality product!”

Vitamin D is known as the “Sunshine Vitamin” because spending time outdoors in the sun vitamin d3is known to increase vitamin D levels in the body via the skin.  Our ancestors spent a considerable amount of their time outdoors, but for the first time in history, large amounts of the world population spend most of their time inside their offices and homes.

This has lead to a widespread vitamin D deficiency.  Spending some time in the sun a few days a week is good, and when taking supplements, vitamin D3 is the best form.

Besides strengthening muscle and bone, researchers have also discovered that vitamin D helps to regulate the sleep-wake cycle and its deficiency has a role in the current global epidemic of sleep disorders. This makes vitamin D a vital benefit in insomnia, which is another condition that can often plague menopausal women.

The newest vitamin D study from Brazil focused on muscle strength in postmenopausal women and took place over a nine-month period.  It was a placebo controlled trial and was double-blinded – which means that neither the participants nor the researchers knew which women received the vitamin D and which didn’t.  Three types of tests were used to measure muscle strength: A chair rising test that measured leg strength when standing up from a chair, a total body x-ray, and a hand-grip test.

At the conclusion of the trial, the women who received the placebo ended up having reduced muscle mass and muscle degeneration of 6.8%.  They also had twice as many falls as the vitamin D group.  On the other hand, the women who took the vitamin D supplement had a major increase in their muscle strength of over 25% — even when taken 12 years after menopause. The results of the research were presented at the annual meeting of the North American Menopause Society.

Dr. L.M Cangussu of the Botucatu Medical School at Sao Paulo State University in Brazil said: “We concluded that the supplementation of Vitamin D alone provided significant protection against the occurrence of sarcopenia, which is a degenerative loss of skeletal muscle.”

Vitamin D has many vital roles in the health of the body, including supporting the heart, brain and nerves.  Additionally, a study from the Journal of Investigative Medicine found that vitamin D is a strong boost to immunity and that deficiency is common in autoimmune disease – a group of diseases where the body’s immune system attacks healthy cells by mistake. These include multiple sclerosis, rheumatoid arthritis, diabetes and inflammatory bowel disease.

Foods containing vitamin D on a wooden background. View from aboveSome good vitamin D-rich foods include cod liver oil, sardines, salmon, mackerel, eggs and herring. The best supplement form to take is vitamin D3, as this is the natural form made by the sun on skin, rather than D2.

This natural health news is provided by Nutrition Breakthroughs, a publisher of nutrition articles and supplier of effective natural remedies since 2001. Nutrition breakthroughs makes Sleep Minerals II, the effective natural sleep aid with calcium, magnesium and vitamin D3, as well as Joints and More, the natural solution for joint relief, aches and pains, stronger hair and nails and more energy.

 

 

Article source: http://www.nutritionbreakthroughs.com/blog/2016/06/26/new-menopause-study-vitamin-d-builds-muscle-strength/