Hormone-like Vitamin
Vitamin D3
A fat-soluble vitamin that functions like a hormone, supporting brain health and mood regulation.
KÖGN Health grades Vitamin D3 as A (Strong evidence) and rates it 4.4 out of 5.
Last reviewed · June 2026
Primary effects
- Improved mood
- Cognitive support
- Neuroprotection
How it works
Regulates neurotransmitter activity and supports mood, cognition, and brain development.
Overview
Vitamin D3 plays a key role in brain function, with receptors present throughout the central nervous system. Low levels have been associated with mood disorders and cognitive decline. Its effects are most noticeable in individuals with deficiency, where supplementation can significantly improve mental well-being and cognitive stability.
Related ingredients
Graded entries that target the same cognitive goals.
Categories
Educational information, not medical advice. The evidence grade is KÖGN’s editorial assessment of published research, not a health claim. Speak to a qualified clinician before changing what you take.