02/01/2026
VITAMIN D3 - IMMUNE AND MOOD SUPPORT
Have you checked your Vitamin D3 blood levels?
This would be a good start to ensure you are taking the most appropriate and meaningful dose for your needs.
Many people self medicate with Vitamin D in the Netherlands but not many take the approach of testing and applying an accurate and personalized dose.
Especially if you suffer from an autoimmune immune disease, this is critical. Research has shown that our Vitamin D levels are at an all time low by the end of winter and this is correlated with seasonal immune system related flares in early spring.
https://pmc.ncbi.nlm.nih.gov/articles/PMC3317188/
By taking a daily and appropriate amount of vitamin D3 especially through winter (and getting sun exposure if possible) you can prevent a relapse in your condition.
Think also about hay fever in Spring time - while not autoimmune, I have found many people with seasonal allergies also have low or suboptimal vitamin D3 levels. Correcting this can go a long way to creating a solid foundation for your immune system.
Now it the time to test and correct ✅
Here are the Vitamin D Supplementation Dose guidelines I use from the Institute of Functional Medicine:
Normal dosing of vitamin D depends on your blood levels. Treatment doses for blood level
ranges are:
