Vit D deficiency does not cause sinusitis directly But yes it affects your immune system… weakens ur ongoing inner system… so that is why you are having sinusitis frequently

No. vit d deficiency does not cause sinusitis.

Hi, I am Dr. Atul Kumar Nimawat MS ENT. Your Vitamin D level of 5 ng/mL is considered severely deficient (normal range: 30–100 ng/mL). While Vitamin D deficiency doesn’t directly cause sinusitis or pharyngitis, it can significantly impair your immune function, making you more susceptible to frequent infections, including upper respiratory tract infections like sinusitis and pharyngitis. Several studies have shown that low Vitamin D levels are associated with increased risk and severity of respiratory infections. Therefore, while it may not be the sole cause, your deficiency could be a contributing factor to your current symptoms.