Vitamin D supplements

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Hello,

Please does anyone know how long is the half life of vitamin D 10,000 iu supplements? How long does it stay in your system (body).

Thanks,

Lola

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5 Replies

  • Posted

    Hey,

    This is taken from Vitamin D Council: “The half-life of 25(OH)D3 is about 3 weeks. That is, it takes about 3 weeks for the body to metabolize one-half of a dose of vitamin D. However, this depends on initial levels, the lower the initial level the longer the half-life”. 

    Hope this helps,

    MrLeaf

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    • Posted

      Please note that the previous comment was about the half life of vitamin (d3) and not (d2) as d2 has a much lower half life than d3. 
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  • Posted

    What does half life mean? Is this how lon it stays in the system? Or how long it takes to take effect? Sorry if it’s a dumb question. Just trying to learn as much as I can about my deficiency. I’ve take d2 for 5 weeks and d3 for a week with no to little improvements yet. 
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    • Posted

      I am an amateur too and not a pro but I found this from dictionary.com.

      "half-life: Also called biological half-life. Pharmacology: the time required for the activity of a substance taken into the body to lose one half its initial effectiveness."

      I don't know about level of effectiveness but I personally wanted to know about how long it stays effective in the system. I guess the only way to know about the progress is by blood tests.

      I think D3 is more effective than D2. You could ask your doctor.

      I hope you get well soon.

      Lola

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