# Vitamin D and Psoriasis

**URL:** <https://forum.barbellmedicine.com/t/vitamin-d-and-psoriasis/19419>\
**Category:** Nutrition Q&A \[Moderated\]\
**Created:** [January 10, 2026, 3:21pm UTC](https://forum.barbellmedicine.com/t/vitamin-d-and-psoriasis/19419 "2026-01-10T15:21:21Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![mbdonner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mbdonner](https://forum.barbellmedicine.com/u/mbdonner)\
**Post date:** [January 10, 2026, 3:21pm UTC](https://forum.barbellmedicine.com/t/vitamin-d-and-psoriasis/19419/1 "2026-01-10T15:21:21Z")

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Hi Docs,

I have read your articles and listened to the podcast on Vitamin D, but. I recently read on Medscape that “reduced vitamin D levels during colder or winter months are linked to “increased disease activity, greater disease severity, and more frequent flare-ups in patients with psoriasis.” So my question is, can supplementation help or is this a sunlight only related benefit.

Looking forward to hearing your thoughts.

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**Author:** ![Jordan\_Feigenbaum](https://sea1.discourse-cdn.com/flex001/user_avatar/forum.barbellmedicine.com/jordan_feigenbaum/32/1315_2.png) [@Jordan\_Feigenbaum](https://forum.barbellmedicine.com/u/Jordan_Feigenbaum)\
**Post date:** [January 10, 2026, 3:25pm UTC](https://forum.barbellmedicine.com/t/vitamin-d-and-psoriasis/19419/2 "2026-01-10T15:25:03Z")

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As you know, pretty much everything bad is linked to linked to low vitamin D. Whether or not supplementing vitamin D alters the medical condition is a separate question however, with most investigations showing no benefit of supplementation.

The existing evidence on psoriasis does not seem to show a reliable benefit for supplementing vitamin D. Topical treatments are sometimes used, but that’s not something I’m super familiar with outside of knowing it’s done .

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**Author:** ![mbdonner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mbdonner](https://forum.barbellmedicine.com/u/mbdonner)\
**Post date:** [January 12, 2026, 2:40pm UTC](https://forum.barbellmedicine.com/t/vitamin-d-and-psoriasis/19419/3 "2026-01-12T14:40:56Z")

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Thanks. I thought that might be the answer. That raised a related question that I don’t recall being addressed, although I may have forgotten. Why doesn’t supplementation work? Assume Vitamin D from sunlight is helpful, it’s Winter, less Vit D from sunlight, so why don’t supplements help? Thanks.

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**Author:** ![Jordan\_Feigenbaum](https://sea1.discourse-cdn.com/flex001/user_avatar/forum.barbellmedicine.com/jordan_feigenbaum/32/1315_2.png) [@Jordan\_Feigenbaum](https://forum.barbellmedicine.com/u/Jordan_Feigenbaum)\
**Post date:** [January 13, 2026, 2:19am UTC](https://forum.barbellmedicine.com/t/vitamin-d-and-psoriasis/19419/4 "2026-01-13T02:19:22Z")

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We discussed this in some depth here:

> **[Episode #152: Vitamin D with Dr. Austin Baraki](https://podcasts.apple.com/us/podcast/episode-152-vitamin-d-with-dr-austin-baraki/id1199780143?i=1000535183851)**
>
> Podcast Episode · Barbell Medicine Podcast · 09/13/2021 · 1h 27m