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Vitamin D Overdose?

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Vitamin D overdose!? I didn’t know that this was possible. I live in the top of the United States and rarely travel to warm, sunny places.

I’ve written many posts on PeopleBeatingCancer.org extolling the benefits of  vitamin D while cautioning readers about the risk of vitamin D deficiency.

I’ll try to clarify what I mean when I talk about too much vitamin D in our system.

  • Levels of 50 nmol/L (20 ng/mL) or above are adequate for most people for bone and overall health.
  • Levels below 30 nmol/L (12 ng/mL) are too low and might weaken your bones and affect your health.
  • Levels above 125 nmol/L (50 ng/mL) are too high and might cause health problems.

It’s important to understand that you can’t figure out the above blood levels by supplementing (taking vitamin D supplements). You have to have your blood levels checked. I go to my local CVS but you can go to your doctor probably.

Supplementing with vitamin D can have both benefits and potential drawbacks. Here are some of the pros and cons associated with vitamin D supplementation:


  1. Bone Health: Vitamin D plays a crucial role in calcium absorption, which is essential for maintaining healthy bones and teeth. A deficiency can lead to conditions like osteoporosis and rickets.
  2. Immune Function: Some research suggests that vitamin D may play a role in supporting immune function. It may help the body fight off infections and regulate the immune response.
  3. Mood and Mental Health: There is some evidence to suggest that vitamin D may play a role in regulating mood and preventing conditions like depression. However, more research is needed in this area.
  4. Reduced Risk of Certain Diseases: Some studies have suggested that maintaining adequate vitamin D levels may be associated with a reduced risk of certain chronic diseases, such as heart disease, multiple sclerosis, and certain types of cancer. However, more research is needed to establish causation.
  5. Muscle Function: Adequate levels of vitamin D are important for muscle strength and function.


  1. Risk of Overdose: While vitamin D is essential for health, excessive intake can lead to vitamin D toxicity, which can cause symptoms like nausea, vomiting, weakness, and even serious complications like kidney damage.
  2. Interactions with Medications: Vitamin D supplements can interact with certain medications, such as corticosteroids, cholesterol-lowering drugs, and certain weight loss drugs. It’s important to consult a healthcare provider before starting any new supplement regimen.
  3. Limited Benefits for Healthy Individuals: For individuals with sufficient sun exposure and a balanced diet, supplementation may not provide significant additional benefits and may even be unnecessary.
  4. Possible Side Effects: Some individuals may experience side effects like gastrointestinal discomfort or allergic reactions to vitamin D supplements.
  5. Expense: High-quality vitamin D supplements can be costly, especially if taken in higher doses.
  6. Possible Ineffective Forms: Not all forms of vitamin D supplements are created equal. Some forms may be less effective or absorbed less efficiently by the body.

It’s important to note that before starting any new supplement regimen, it’s advisable to consult a healthcare provider, especially if you have underlying health conditions or are taking medications. They can provide personalized recommendations based on your specific health needs and circumstances. They can also monitor your vitamin D levels through blood tests to ensure you are not taking too much or too little.

Few nutritional supplements are as important to our health as vitamin D is-

Here is another interesting aspect of vitamin D supplementation. It is cheap. And easy. But remember that you and UNDER do it and you can OVER do it. So get your blood checked regularly.

If you have any questions or comments about vitamin D let me know at David.PeopleBeatingCancer@gmail.com.

David Emerson

  • Cancer Survivor
  • Cancer Coach
  • Director PeopleBeatingCancer

Symptoms of Too Much Vitamin D and Supplement Side Effects

“Vitamin D toxicity, sometimes called a vitamin D overdose, is a rare but potentially dangerous condition. It occurs when someone has too much vitamin D in their body. Vitamin D toxicity is also called hypervitaminosis D.

A vitamin D overdose is typically a side effect of taking large doses of vitamin D supplements.1 It would not occur because of direct sun exposure or diet…

“Vitamin D2 vs. D3

The common types of vitamin D received from your diet are D2 (ergocalciferol) and D3 (cholecalciferol). They play the same role in the body but come from different sources. Vitamin D2 comes from plant sources, while vitamin D3 comes from animal sources. Vitamin D3 has been found to bind more effectively, making it a stronger source, which allows for lower doses with the same health benefits.4



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