Common reasons include chronic sinusitis, nasal polyps, blocked sinus passages, and recurrent sinus infections that do not respond to other treatments.

No, this test is performed after consuming a standardized meal.

Typically, blood samples are taken 2 hours after finishing the meal.

Yes, it helps assess how well your body processes glucose after eating.

Elevated levels may suggest impaired glucose tolerance or diabetes.

Results help determine appropriate dietary and medical interventions.

Symptoms may include fatigue, weakness, anemia, neurological changes, and cognitive impairments.

Treatment involves vitamin B12 supplementation through oral tablets or injections, depending on the severity of the deficiency.

Yes, diets low in animal products, such as vegan or vegetarian diets, can lead to vitamin B12 deficiency.

Frequency depends on individual risk factors and health conditions. Consult your healthcare provider for personalized advice.

The test involves a simple blood draw with minimal risks, such as slight bruising at the puncture site.