Parkinson's disease prevented by Vitamin D, but small doses do not treat it - Aug 2023

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Does vitamin D protect or treat Parkinson's disease? A narrative review

Naunyn Schmiedebergs Arch Pharmacol 2023 Aug 9.DOI: 10.1007/s00210-023-02656-6
Hayder M Al-Kuraishy 1, Ali I Al-Gareeb 1, Hend Mostafa Selim 2, Athanasios Alexiou 3 4, Marios Papadakis 5, Walaa A Negm 6, Gaber El-Saber Batiha 7

Parkinson's disease (PD) is a neurodegenerative brain disease (NBD) developed due to dopaminergic neuron loss in the substantia nigra (SN). Vitamin D (VD), VD receptor (VDR), and VD metabolites are highly expressed in the human brain and play a critical role in maintaining different brain functions. VDRs are highly expressed in the SN that regulates the activity of dopaminergic neurons and synaptic plasticity. VD exerts protective and therapeutic effects against the development of PD by modulating dopaminergic neurons of SN. VD reduces oxidative stress and neuroinflammation in PD because of its anti-inflammatory and antioxidant activities. Different studies revealed the protective effect of VD in the management of PD. However, the potential therapeutic effect of VD in well-established PD remains controversial. Therefore, this review aims to elucidate VD's preventive and therapeutic roles in PD.

In conclusion, VD deficiency is associated with increased PD risk, but VD supplementation in well-established PD plays little role.
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VitaminDWiki - Overview Parkinson's and Vitamin D contains:

• Vitamin D associated with Parkinson’s Disease in 55 studies, more studies needed- March 2022
• Parkinson's category has 112 studies
• Parkinson’s Disease and Vitamin D – review of 52 studies – May 2022
• Parkinson patients: 60 % taking Vitamin D – Dec 2019
• Low Vitamin D increases Parkinson's by 3X– July 2010 "only" a 30 year test, need more study
• Parkinson's disease prevented by Vitamin D, but small doses do not treat it - Aug 2023
• 10 clinical trials for PD with vitamin D intervention as of June 2023
• Parkinson’s Disease Summer School – alternative therapies included 60-80 ng of Vitamin D – Sept 2019
• Associated with PD are: Meta-analyses (12 ), Cognition (22 studies), Multiple Sclerosis (17 studies), VIRUS (4 studies), Omega-3 (3 studies), Vitamin D Receptor (11 studies)
• Note by the Founder of VitaminDWiki: I have twice recommended lots of Vitamin D to treat PD. Both got much better, but one had his doctor him cut back to just 2,000 IU. All of his recovery got reversed. With lots of vitamin D he could sing and bike, but now he can barely talk or walk