9 Bizarre Symptoms of Vitamin D Deficiency (You Must Know!)

Vitamin D 5,000:

9 Bizarre Symptoms of Vitamin D Deficiency (You Must Know!) —Are you getting enough vitamin D? In this video, Dr. Nick Zyrowski breaks down everything you need to know about vitamin D3, including proper vitamin D dosage, deficiency signs, and how to supplement safely.

We cover:
• The most common vitamin D deficiency symptoms
• Early and advanced Symptoms of Vitamin D Deficiency
• How much vitamin D should I take?
• Proper vitamin D supplement dosage guidelines
• Risks of high dose vitamin D
• Warning signs of vitamin D toxicity symptoms
• Potential vitamin D side effects
• The connection between vitamin D and autoimmune disorders
• A practical vitamin D foods list to support healthy levels

If you're considering vitamin D supplements, this video will help you understand safe and effective dosing strategies while avoiding common mistakes.

Dr. Nick Zyrowski explains how vitamin D functions more like a hormone than a vitamin — influencing immune balance, inflammation, bone health, and overall metabolic function.

Before you start or adjust your vitamin D intake, make sure you understand:
✔ Proper vitamin D dosage
✔ When higher doses are appropriate
✔ Who is at risk for deficiency
✔ When testing is necessary
Subscribe for more science-based health education from Dr. Nick Zyrowski.

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Disclaimer: Dr. Nick Zyrowski D.C, B.S is licensed and has a clinical practice in the state of Michigan. All information shared by Dr. Zyrowski is for general information purposes only and is not to be used to treat, diagnose or self diagnosis at any time. Dr. Zyrowski's use of the term doctor when referring to himself is simply referring to his degree and licensing. There is no doctor patient relationship between you and Dr. Zyrowski. You should seek advice from your health care practitioner before changing anything in the way of your dietary, nutritional or health regiment. You should always seek advice from your qualified health care physician regarding any health condition. NuVision Excel, NuVision Health Center, Dr. Nick Zyrowski and Dr. Zyrowski are not liable or responsible for any advice, course of treatment, diagnosis or any other information, services or product you obtain through this video or site.

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15 Comments

  1. @dr.nickzyrowski on February 17, 2026 at 3:48 pm

    👉 Watch Next: High Dose Vitamin D Treats Incurable Diseases?: https://youtu.be/dTNXqXWhxpI

    • @Tirelesswarrior on February 17, 2026 at 4:18 pm

      Doc. I hope you don’t mind my question. Has this product undergone 3rd party testing? I’d like to order them.

  2. @TroyHiscock on February 17, 2026 at 3:51 pm

    I never would talk too a dr. About health…use a open a.i….tells you what you need to know..plus a bunch of things you never thought of…a.i will replace most dr. In the near future….3rd leading cause of death is going to the hospital

  3. @Horsewoman-pt2ku on February 17, 2026 at 3:52 pm

    Yes. Depression most drs go to drugs. They never go to vitamins or supplements

    • @lisah5784 on February 17, 2026 at 4:08 pm

      Always 😒

  4. @aimhigher7805 on February 17, 2026 at 3:56 pm

    I used to get sick all the time when I lived in town. After i became a farmer, I haven’t been sick in 5 years. Ive had food poisoning once.

  5. @pretribraptureisfalse on February 17, 2026 at 4:00 pm

    What is D3 cholecalciferol?

    From Wikipedia;
    Rodents are somewhat more susceptible to high doses than other species, and cholecalciferol has been used in poison bait for the control of these pests.

    The mechanism of high dose cholecalciferol is that it can produce “hypercalcemia, which results in systemic calcification of soft tissue, leading to kidney failure, cardiac abnormalities, hypertension, CNS depression, and GI upset. Signs generally develop within 18–36 h of ingestion and can include depression, loss of appetite, polyuria, and polydipsia.” High-dose cholecalciferol will tend to rapidly accumulate in adipose tissue yet release more slowly which will tend to delay time of death for several days from the time that high-dose bait is introduced.

    In New Zealand, possums have become a significant pest animal. For possum control, cholecalciferol has been used as the active ingredient in lethal baits. The LD50 is 16.8 mg/kg, but only 9.8 mg/kg if calcium carbonate is added to the bait. Kidneys and heart are target organs. LD50 of 4.4 mg/kg has been reported in rabbits, with lethality to almost all rabbits ingesting doses greater than 15 mg/kg. Toxicity has been reported across a wide range of cholecalciferol dosages, with LD50 as high as 88 mg/kg or LDLo as low as 2 mg/kg reported for dogs.

    Researchers have reported that the compound is less toxic to non-target species than earlier generations of anticoagulant rodenticides (Warfarin and congeners) or Bromethalin, and that relay toxicosis (poisoning by eating a poisoned animal) has not been documented.
     Nevertheless, the same source reports that use of cholecalciferol in rodenticides may still pose a significant hazard to other animals, such as dogs and cats, when rodenticide bait or other forms of cholecalciferol are directly ingested.

    • @justrose6978 on February 17, 2026 at 5:42 pm

      OMG man, you freaked me the F out! Immediately did my research. The baits use 100-300 grams of cholecalciferol. 40,000 IU is approximately 1 microgram. HUGE difference! Dosage is key.
      Quit fear mongering! Do you have any idea how many safe substances when taken in high doses are lethal? ALOT…so quit it Sherlock. You helped no one in your thoughtless comment.

  6. @jaredzimmy on February 17, 2026 at 4:04 pm

    What about magnesium I heard D3 needs magnesium to absorb

    • @justrose6978 on February 17, 2026 at 5:13 pm

      You’re 💯 correct!

  7. @1poppop100 on February 17, 2026 at 4:05 pm

    Thanks for your service Dr😮😅

  8. @Tirelesswarrior on February 17, 2026 at 4:13 pm

    I just had my test done. It was 26. The result was marked insufficient but not deficiency level. How serious is this level of my vitvD?

  9. @smarzig on February 17, 2026 at 4:21 pm

    Constant bone infections in the dental area

  10. @panagenesis2695 on February 17, 2026 at 4:27 pm

    Sunlight is superior to supplementation.

  11. @monicajnares3280 on February 17, 2026 at 7:00 pm

    I stopped for awhile. I have a autoimmune condition i cant hardly walk. Should i up vitamin d3

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