Vitamin D
supplementThe 'sunshine vitamin' that supports immune function, bone health, and mood regulation.
Conditions It May Help
Bladder Infection
Vitamin D stimulates production of cathelicidin, an antimicrobial peptide in the bladder lining that helps fight off bac...
Cold & Flu
Vitamin D activates antimicrobial peptides and strengthens innate immune defense against respiratory viruses. Deficiency...
Allergies
Vitamin D modulates the immune system, shifting it away from the overactive Th2 response that drives allergic reactions....
Where to Buy
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⚠️ Safety Information
Always consult your healthcare provider before starting any natural remedy, especially if you are pregnant, nursing, taking medications, or have a medical condition. Natural does not always mean safe — interactions with medications are possible.
Last reviewed: February 2026