If you are prone to respiratory infections, consider supplementing your diet with Vit D. It will help protect u from bacterial, fungal and viral infections.

Dosage, Use and Cautions (per Life Extension):

Take one capsule daily, or as recommended by a healthcare practitioner.

This product is best utilized when taken in divided doses with fat-containing, low fiber meals.

Individuals consuming more than 2,000 IU/day of vitamin D (from diet and supplements) should periodically obtain a serum 25-hydroxy vitamin D measurement. Toxicity is very unlikely in healthy individuals at a dose of less than 10,000 IU. Vitamin D supplementation is not recommended for individuals with hypercalcemia (high blood calcium levels). People with kidney disease, certain medical conditions (such as hyperparathyroidism or sarcoidosis), and those who use cardiac glycosides (digoxin) or thiazide diurectics should consult a physician before using supplemental vitamin D.

When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

For more detailed information on this product go to LEF.org.