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Sinus Defense

(22 reviews) Write a Review

Sinus Defense is a breakthrough homeopathic formula created by Dr. Don Dennis, MD FACS, and is designed to enhance immune intelligence for a broad array of molds, allergens, and viruses. Sinus Defense is based on the concept of using immune messenger molecules to "teach" the body how to identify, bind to, and eliminate pathogens, so that it can react faster and more efficiently.   

Sinus Defense’s sublingual delivery method allows rapid absorption into the bloodstream of Transfer Factors, small immune messenger molecules programmed to immediately identify and bind to pathogen-infected cells (mold, bacteria, virus).  Once marked, your immune system easily learns which infected cells to attack and destroy.   

Because Sinus Defense is designed to impart immune-system information directly to your cells, the response to pathogens may be boosted without the heightened inflammation that often results from exposure to mold, environmental toxins, and viruses.    


  • Promotes immune intelligence
  • Boosts & strengthens your immune system
  • Supports cellular resilience and health
  • Helps rid the body of harmful invaders
  • Reduces allergic response to molds and common allergens
  • Reduces sinus inflammation and congestion
  • Safe for use with other Rx medications or supplements

30-day or more supply in each bottle
(depending on dosage and frequency of use)

Note: High-quality homeopathic products contain small amounts of organic alcohol because it helps to hold the potency of the formula stable and enhances absorption. If you are sensitive to alcohol, or if you notice any irritation under your tongue, place the sprays in a small amount (10-20 cc) of warm (not hot!) water for 5-10 minutes. This will evaporate the alcohol before you take it. Swish the entire liquid around in your mouth for 30 seconds before swallowing to allow the ingredients to be absorbed through the mucosa of the mouth.

Learn More About Sinus Defense >



0.27 LBS
Product Size:
Active Ingredients:
Lac Vaccinum 3x, 6x, 30x, 60x, 200x, Silicea 5x
Inactive Ingredients:
Alcohol USP 20%, Purified Water.
Package Type:
Single Product
Directions for Use: Adults: For nasal symptoms apply 3-9 sprays under tongue, 2-3 times daily. Use 9 sprays under tongue, 3 times daily when symptoms increase or additional immune support is needed. For sore throat, open mouth and apply 3-9 sprays directly on sore throat, 2-3 times daily. Adjust number of sprays and applications as needed. For example, if you know you have had a mold exposure, increase dosage or frequency of use. Consult a physician for use in children under 12 years of age. Do not take within 15 minutes of consuming food or brushing teeth. One bottle lasts for 6-8 weeks depending on number of sprays used. NOTE: Sinus Defense does not require physician allergy testing prior to use. It can be used in conjunction with allergy shots or immunotherapy.


When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page.

Returns Policy:

You may return items sold by Micro Balance Health Products with which you are not satisfied within 30 days of the order for a full refund. (Note: See below EC3 Sanitizer Fogger return policy). We will pay the return shipping costs if the return is a result of our error in shipping an item that you did not order. Items should be returned in their original product packaging.

EC3 Sanitizer Fogger Return & Refund Policy: All foggers are protected under a 1-year manufacturer’s limited warranty. This warranty covers mechanical issues and defects. Due to health and safety regulations, all Foggers are a FINAL SALE item.

Please email us about the items you would like to return and we will guide you through the process.

Mailing Address:

Micro Balance Health Products
Attn: Returns
3193 Howell Mill Road, Suite 215Atlanta, GA 30327


Toll-Free: 1-888-404-8958
Fax: 404-352-2798

22 Reviews Hide Reviews Show Reviews

  • Sinus Defense

    Posted by Amy Shirey on Oct 28th 2021

    My whole family uses Sinus Defense! During fall, Spring, when allergy season or flu season is in full swing and particularly when the grandkids start school and strep throat is spreading, we spray Sinus Defense under their tongue everyday and it is amazing who little they become ill. We have been using this for 3+ years with sucess! My husband who works for a University and comes in contact with college students swears by Sinus Defense. He uses it daily and thus far has not gotten COVID. We are so thankful for this product. It definitely helps your immunity. Our family will not be without it!

  • CitriSinus spray

    Posted by Mary Adams Gilbert on Oct 24th 2021

    Since using this product I can tell difference in my allergies and it calms my sinus problems. I feel healthier since using this product and I’ve been able to cut way back on the antibiotics prescribed for me. I make sure to use this more prior to going out into public with COVID going on. There’s something about this product that seems to help strengthen the system. Love this stuff and will continue to purchase it.

  • Sinus Defense & COVID

    Posted by Robert Brown on Oct 18th 2021

    I happened to have purchased this for our family. Then we got COVID. The minute I realized something was going on, I began spraying Sinus Defense. It was one of the best tools in my arsenal to fight off this viral infection. It was rough, but I am convinced would have been worse without Sinus Defense. We will not be without this product in the future.

  • Favorite sinus / cold producy

    Posted by Jessie on Oct 11th 2021

    My absolute favorite - kicks a sinus cold right in the but - safe and great to use when pregnant too


Sinus Defense


Sinus Defense


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