Vitamin D's Many Benefits & Vitamin D Deficiency Symptoms

Dr. Craige Golding
October 22, 2020

Vitamin D has seen an increase in attention in the past couple of years. This is especially true as more and more studies show the many ways that this vitamin impacts our health.

The majority of people are deficient in vitamin D. This is mainly because of the use of sunscreen and the little time that people spend outdoors.

We also tend to have less efficient absorption of vitamin D as we age. Darker skin and living at higher latitudes also increases the risk.

People with a higher risk of low vitamin D levels include:

  • House or office-bound people
  • Those with renal disease
  • Persistent musculoskeletal pain
  • Osteoporotic people
  • Inflammatory bowel disease
  • Celiac disease
  • People who are on anticonvulsants.

Can we check our levels?

The best measure of vitamin D levels is 25 hydroxy vitamin D. Deficiency is less than 20 ng/ml, normal levels are above 32 ng/ml. Optimal levels are in the range of 60 ng/ml. The old dose recommendation of 400 IU/day of vitamin D is not sufficient to prevent fractures in the elderly.

Doses of above 1000 IU (especially if older than 50) prevent deficiency. Safe doses of up to 2000IU can be taken. Remember that you can have your levels checked and monitored.

Functions of vitamin D

Vitamin D is important for

  • calcium absorption
  • immunity
  • avoidance of autoimmune reactions
  • maintenance of weight and blood pressure
  • prevention of arterial calcifications
  • prevention of cancer.

Michael Holick of Boston University says “sensible sun exposure (usually 5-10 minutes of exposure of the arms and legs or the hands, arms, and face, 2 or 3 times per week) and increased dietary and supplemental vitamin D intakes are reasonable approaches to guarantee vitamin D sufficiency.”

Robert Heaney of Creighton University claims that it would require 2600 international units of oral vitamin D3 to ensure that 97.5% of older women achieve optimal vitamin D levels.

Vitamin D Deficiency Symptoms

Signs and symptoms of vitamin D deficiency in adults might include:

  • General Fatigue
  • Bone pain
  • Muscle weakness, aches or cramps
  • Changes in mood

Sunscreen - can we overdo it?


Sunscreen lotions block the vitamin D producing UV-B rays. It also allows the deeper penetrating UV-A rays to reach the skin. In the 1970s campaigns ran to promote the use of sunscreen blockers.

Mortality rates due to malignant melanoma increased. It is important for the skin to be exposed to UV-B sun rays. This helps the production of vitamin D naturally. Sunscreen lotions applied to the face though will protect from premature wrinkling.

Safer ways to protect the skin from sun damage and skin cancer include topical or oral antioxidant supplements.

Natural ways to protect the skin from damage

Topical vitamin C and E combined with green tea extract, ferulic acid or other antioxidants may be an option to prevent skin ageing and skin cancer.

Health benefits of vitamin D

Higher vitamin D levels have been associated with a lower risk of dying from many causes over a 7 year period. This was especially noteworthy with regards to cardiovascular disease.

“This prospective cohort study demonstrates for the first time, to our knowledge, that low 25- hydroxyvitamin D and 1.25-dihydroxy vitamin D levels are associated with increased risk in all-cause mortality compared with patients with higher vitamin D levels”

Breast cancer protection

The conclusion of this pooled analysis of vitamin D and the prevention of breast cancer was that the intake of 2000 IU/d of vitamin D3. Also, when possible, very moderate exposure to sunlight could raise serum 25(OH)D to 52 ng/ml. This is a level associated with reduction by 50% in the incidence of breast cancer, according to observational studies.

For women already diagnosed with breast cancer, vitamin D may slow the progression of the disease. In 2006, researchers at the Imperial College of London. Vitamin D levels were significantly higher in the women with early-stage disease than in women whose breast cancer had progressed to a more advanced stage.

In August 2007 researchers at the University of California reported that an estimated 250 000 cancers of the colon and 350 000 breast cancer cases could be prevented worldwide each year with vitamin D supplementation. They recommended doses of 2000 IU/d for a meaningful reduction in breast cancer.

Multiple sclerosis links

Children later diagnosed with multiple sclerosis had far lower levels of vitamin D than other youngsters. Canadian researchers reported this in studies showing more links between low vitamin D and disease. Other studies show that adults who live in northern latitudes, who get less sun exposure, may have a higher risk of multiple sclerosis.

They also support a growing body of studies that link low vitamin D with disease. This includes breast and colon cancer, heart disease, diabetes and tuberculosis.

Evidence suggests that vitamin D helps lower blood pressure, reduces inflammation and boosts the immune system. Vitamin D acts as an immune modulator. In multiple sclerosis, there are many lines of evidence that immune cells are not regulated properly.

One of the things that influence that balance is vitamin D. Interestingly, Canadians have one of the highest rates of multiple sclerosis in the world. In Canada for 6 months of the year, the sun is not intense enough to manufacture vitamin D in the skin.

Cardiovascular challenges

There is an increased incidence of peripheral arterial disease in individuals who have low vitamin D, a new study has found. After examining the data, the study authors found that there was a greater prevalence of peripheral arterial disease in subjects with the lowest levels of vitamin D compared to subjects with the highest levels.

For each 10 ng/ml decrease in vitamin D level, the risk for peripheral arterial disease increased by 29%.

Anti-ageing effects

New evidence suggests that high levels of vitamin D have a strong correlation with increased leukocyte telomere length. This is important for one’s health and longevity. Leukocytes (white blood cells) are the backbone of the body’s immune system.

Like all cells, leukocytes contain our chromosomes, which consist of DNA and associated proteins. Telomeres are tiny terminal segments at each end of the DNA molecule. They serve a vital role by protecting DNA from damage during cell division.

Telomeres also prevent the ends of DNA molecules from joining to each other to form loops, or from joining end-to-end with the DNA in other chromosomes-disastrous scenarios both.

By extending the length of the DNA strands with their genetically blank material, they give the enzymes enough space to work with by replicating the genetically useful material all the way to its end, thus preserving every last gene.

Were it not for this protective action, some of that material would be lost in each replication, resulting in deterioration of cell function, and of one’s health.

Telomere length decreases in cells as we age, ultimately resulting in ageing of the cell, and eventually no further cell division. A ribonucleoprotein telomerase, whose function is to extend the length of telomeres is only found in appreciable amounts in sex cells, stem cells and UNFORTUNATELY cancer cells.

Extending telomere length has huge potential as an antiaging tool in preserving the cellular and DNA health


Pre-eclampsia (proteinuria, high blood pressure and odema in pregnancy) can cause huge health problems for both mother and fetus.

A study carried out at the University of Pittsburgh found that vitamin D deficiency early in gestation is associated with a five-fold increase risk of developing pre-eclampsia.

Vitamin D and diabetes

Recent research has demonstrated that those who receive high amounts of vitamin D during childhood have a lower risk of developing type 1 diabetes later on in life, the greater the amount of vitamin D, the greater the benefit.

Type 1 diabetes comes about due to the insulin-producing beta cells of the pancreas being destroyed by our own immune system, starting early in childhood.

Vitamin D and brain function

The brain contains vitamin D receptors. It has been discovered that vitamin D plays a very important role in maintaining and achieving a healthy mind. What is also known is that low vitamin D levels have been implicated to increase depression in the elderly.

This information is useful because depression can potentially be treated in the future with vitamin D rather than with dangerous psychotropic medications.

Vitamin D – a new pain killer?

Women who get the right amount of vitamin D are less likely to suffer from chronic widespread pain, according to a new study in the annals of rheumatic diseases. Vitamin D is actually a hormone that is intimately involved with bone and immune system health.

In addition to promoting normal bone development, there is evidence that getting enough vitamin D helps protect against multiple sclerosis, type 1 diabetes, and certain cancers. Studies have shown that many people suffering from chronic pain have low vitamin D levels and that supplementing with vitamin D can relieve certain types of pain.

Can I get vitamin D from food?

natural sources of vitamin D
Natural sources of vitamin D

There are indeed food sources of vitamin D that you can incorporate into your life.

Food sources of vitamin D

  • Egg yolks
  • Fortified foods
  • Oily fish such as salmon and herring
  • Mushrooms such as portabella and morel (if exposed to UV light)
  • Whole milk
  • Soy milk
  • Yoghurt

Sunshine Mushroom Soup

mushroom soup
  • ¼ cup unsalted butter
  • 1kg sliced portabella mushrooms (exposed to UV light)
  • 1 diced onion
  • 1 ½ tablespoons of all-purpose flour
  • 6 sprigs fresh thyme
  • 2 cloves garlic, peeled
  • 4 cups chicken broth or three stock cubes
  • 1 cup of water
  • 1 cup whipping cream
  • salt and black pepper to
  • 1 teaspoon fresh thyme leaves for garnish, or to taste

Melt the butter in a large pot of medium heat and cook the mushrooms with a pinch of salt until juicy. Reduce heat to low and stir often until the mushrooms are golden brown. Add the onion to the mix and cook until soft and translucent.

Stir the flour into the mix and cook for two minutes. Add the thyme and garlic cloves. Pour the chicken stock and water into the pot, bring to a simmer and cook for 1 hour. Remove the thyme.

Put the soup into a blender in small batches and blend until you have a smooth and thick consistency

Return the soup to the pot and stir in the cream

Season with salt and freshly ground black pepper and serve in bowls.

Do I really need to supplement?

Personally I am finding in my practice that more than 70% of my clients are deficient in the sunlight vitamin and require supplementation.

For most people supplementing though with 1000-2000 IU is the way to go. Suggested is to check your levels.

It is my belief that this critical vitamin can no longer be overlooked or underestimated!

Your Wellbeing Vitamin D3

Dr. Carel-Piet van Eeden
About The Author

Dr. Carel-Piet van Eeden

Dr van Eeden completed his Ph.D and qualified in Holistic Life Counselling in December 2012 through the University of Sedona.  He is currently pursuing an MBAM through the same University.

After experiencing the trauma of cancer first-hand, Carel-Piet decided to leave his corporate position as legal business analyst and focus on the field of integrative medicine.  Together with Dr. Craige Golding, he works in the Golding Institute to provide evidence based integrative solutions and training for healthcare providers and patients alike.

As a practitioner, Dr. van Eeden focuses on a wide array of challenges people face.  Because of his diverse training, the challenges addressed in sessions are many and include:

  • Lifestyle management
  • Genetic testing
  • Emotional counseling
  • Mindfulness
  • Life Coaching