10/06/2026
Vitamin D controls mood regulation, so if you’re deficient, you could experience a range of moods in a short time.
This is due to vitamin D’s involvement in the production of serotonin, a key neurotransmitter that plays a role in emotional balance, mood regulation, and general mental well-being.
While sun exposure is a natural way to prevent vitamin D deficiency, it may not be enough to maintain optimal vitamin D stores. In that case, supplementing with vitamin D3 can be an effective way to promote healthy levels.
Dr. Eric Berg, DC, not MD; information only