What Is The Side Effects Of Too Much Vitamin D – 5 Proven Side Effects Of Too Much Vitamin D!

Having Sufficient amount of Vitamin D in the body has lots of health benefits. An adequate amount of Vitamin D will not only correct most health challenges arising from Vitamin D deficient like Rickets, it will boost our health in so many ways.

Vitamin D is a fat-soluble vitamin and can be obtained when the skin is exposed to the sunlight and can also be gotten from selected foods source.

Two major types of Vitamin D are known.

  1. Vitamin D2 known as ergocalciferol which is can only be synthesized by plants and not produced by the body.
  2. Vitamin D3 also scientifically called cholecalciferol can only be synthesized when the skin is exposed to sunlight. It can also be ingested as supplements or from the animal source.

What Is The Side Effects Of Too Much Vitamin D

Vitamin D is important for so many body functions such aiding in calcium absorption, building and maintaining bone and teeth, help in regulation calcium and phosphorus levels in the body.

Clinical studies have also shown that Vitamin D working alongside calcium can boost weight loss, strengthen the bones and help with cases of Osteoporosis.

Low Vitamin D

You probably have heard that not getting enough vitamin D on a daily basis can cause you your health and give unimaginable health challenges, yes, that’s true.

Lack of adequate Vitamin D has been attributed to series of health breakdown such as


What Is The Side Effects Of Too Much Vitamin D

  • Increased blood pressure
  • Difficulty thinking clearly.
  • Bone pain.
  • Weak and Porous bone prone to fractures.
  • muscle weakness.
  •  Bones becomes soft leading to some form of deformities.
  • Unexplained Chronic Fatigue.

These and many other health Issues can appear when one is deficient in Vitamin D.

Vitamin D Megadose And Toxicity.

Vitamin D can naturally be synthesized by the body when the skin is exposed to the sunlight for at least 15 minutes, and can also be obtained from some food sources like Salmon fish, and some vegetables and fruits.

However, in some regions where people don’t have enough sunshine to exposed their skins for Vitamin D, people may run low of Vitamin D and that can cause some health challenges.

In a bit to avoid having low Vitamin D or in treating Vitamin D deficiency, many people resort to taking Vitamin D supplements, some taking in more than the normal dose called megadose and that can lead to toxicity or hypervitaminosis D as scientifically called.

Vitamin D being a fat-soluble vitamin Vitamin means the body can store any excess for future use.

The human body can also regulate Vitamin D coming from the sun and fortified food. The main cause of hypervitaminosis D or Vitamin D Toxicity is megadose of Vitamin D Supplements. The human body hardly can regulate megadose of supplemental Vitamin D.

The immediate solution to Vitamin D megadose is to stop taking in excess vitamin D.


5  Proven Side Effects Of Too Much Vitamin D.

Excessive intake of vitamin D will cause a toxic build up in the system and that can cause some health issues. Although it is rare to have vitamin D build up to toxic level because of the body’s ability to regulate Vitamin D from the sun.

However, it is common for people that suffer from a deficiency of Vitamin D to use the supplement in a bit to build it up to the body’s requirement and at the process take in excess.

Remeber the body stores up any excess for future use but a continuing intake of excess will result in a build up so much that the body can not use all leading to toxicity.

Vitamin D toxicity comes with some known health crises, some of which are explained below.

1.Weaken Kidney Leading To Kidney Failure.

What Is The Side Effects Of Too Much Vitamin D

Studies showed that a continued intake of  50,000 international units (IU) a day of vitamin D for several months will lead toxicity.

The Recommended Dietary Allowance (RDA) for most adults of 600 IU of vitamin D a day and any dose above that is like like to cause a toxic build on a long run. Although most people that take an overdose of more than the Recommended Dietary Allowance do so to treat cases of Vitamin D deficiency.

The problem here is toxicity will lead to the kidney been overworked as you pass urine more frequently, and it will get to a level the kidney will become tired or weaken making it unable to function properly, and the resultant effect can be kidney failure.


2. An Elevated Blood Calcium Level.

What Is The Side Effects Of Too Much Vitamin D

Vitamin D as a fat-soluble vitamin means your body can automatically store any extra not needed at that particular time, and a continues ingestion of an amount more than 4,000IU means the body will have a difficult time getting rid of the extra.

The most important role of Vitamin which is helping the body absorb calcium would be defeated once the intake of Vitamin D is in excess. Instead, a chemical is produced in the liver called 25(OH)D and when this chemical is high it leads too high blood calcium.

High Blood Calcium is a condition known as hypercalcemia. Symptoms of High Blood Calcium or hypercalcemia include:

  • Feeling sick or being sick
  • Lack of appetite in some people.
  • Unusual thirst.
  • Frequent Urination.
  • Constipation or diarrhea and abdominal pain
  • Muscle weakness or pain
  • Bone pain
  • Confusion and Dizziness.
  • Chronic Fatigue or feeling tired.

The immediate solution would be to stop taking excessive Supplemental Vitamin D. You can talk to your Doctor to determine the range that is appropriate for you.

3.High Blood Toxicity.

Vitamin D is good for the body, there is no doubt about it. It helps the body absorb calcium effectively, it also helps the body perfume other important functions to keep life going smoothly.

In order to help the perfume its functions effectively, Vitamin D when taken flows through the bloodstream to other parts of the body.

However, too much intake of Vitamin D will lead to it becoming toxic to the blood and once that happens, the toxicity is carried through the blood round other parts of the body.

The implication here is cells of the body are affected by the incoming blood toxicity from too much vitamin D rendering the cells weak and unable to function properly.

A weaken cells mean the entire body is weakened and a weakened body prone to a breakdown.

A quick solution is in reducing the amount of vitamin D intake.

4. Poor Appetite, Unusual Thirst, Nausea and sometimes Vomiting.

what is the side effects of too much vitamin D

One of the many side effects of taking too much supplemental vitamin D is a complete or partial loss of appetite, nausea accompany with vomiting in most cases and an unusual feeling of taking more water. Although this symptom is not felt by everyone with too much intake of Vitamin D, one study has it that 1 out of every 10 people with too much intake of Vitamin D experience this.

One study shows one woman with nausea and she also experienced chronic weight loss and it was discovered her vitamin D overdose was up to the roof.

Although having too much vitamin D is rare, it is however common among people that take supplemental Vitamin D either to treat an ailment or to build up their vitamin D deficiency.


5. Low Bone Density.

what is the side effects of too much vitamin D

One of Vitamin D’s chief functions is to aid the body to absorb calcium and when that happen, our bones are feed most of the calcium and that gives the bones the needed minerals, density, and strength.

However, Too much vitamin D has been reported to cause problems for the bones instead of helping it. Vitamin K is needed to regulate the inflow of calcium in the blood but too much vitamin D will overshadow and defeat vitamin K and that means there will be less vitamin k and less calcium in the bone as all the calcium will flow to the blood causing blood toxicity and starving the bones of calcium.

Less calcium in the bones means the bones will become porous, lack nutrients, loss shape, become weak and osteoporosis and other bone diseases like rickets and more deadly ones like bone cancer will set in.


The quick solution here can be to supplement vitamin K and to stop the megadose of Vitamin D.


There are other symptoms and risk factors associated with too much vitamin D like High blood cholesterol when too much calcium is released into the blood, it combines with protein to form blood fat and that on itself can pose a serious health challenge.

How Much Is Vitamin D Too Much?

Overall, there is no universal rule for everyone as to what the requirement is in vitamin D, the requirement varies from individuals. Some may need to take a slightly higher dose than others especially those who have been diagnosed with low Vitamin D.

Again, the daily requirement varies from age group to age group. Below is the standard set by the National Institutes of Health as the maximum tolerable upper limit at, and it varies from age to age:

  • 1,000 IU daily for infants 0 to 6 months
  • 1,500 IU daily for infants 6 months to 1 year
  • 2,500 IU daily for children 1 to 3 years
  • 3,000 IU daily for children 4 to 8 years
  • 4,000 IU daily for anyone over 9.

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