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Sinus Defense

(22 reviews) Write a Review

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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 allows me to breathe!

    Posted by Betsy on Apr 21st 2022

    I use Sinus Defense and Citridrops Nasal Spray several times daily. Consistent use is helping to eliminate my facial pain and reduce my sinus infections! Hallelujah

  • Keeps symptoms at bay

    Posted by Nora on Feb 24th 2022

    I use this spray 2 times a day and it keeps my symptoms at bay, hooray!

  • Alcohol content

    Posted by on Dec 21st 2021

    I want potential buyers of this product to be aware of the high alcohol content of 20%. My functional medicine doctor has advised me not to take this - alcohol for those of us with food intolerances stemming from mold are advised to avoid alcohol. I will be returning and hopefully get my money back. Yes, it's on the label as shown in the photograph but I doubt few notice it. I'm glad a read the label carefully for the shipped product and did not use it.

  • Sinus Defense

    Posted by Kerry James on Oct 31st 2021

    Life changing! Highly recommend it! This product helps me so much and I am grateful that it exists! I always have a bottle of this on “stand by” as I have CIRS plus the genetic defect where my body does not recognize mold as something to get rid of. This spray helps my body “detect” and then detox any mold I may have been exposed to when I was out shopping, for example, as mold in HVACs is so common. I do a lot to avoid mold but places like the DMV where you have to go to get a new license etc are just places we have to endure. I feel confident when I have this by my side and knowing it works so well for me alleviates a lot of the anxiety I have about going into public spaces.


Sinus Defense


This product is currently on backorder. Please check back as inventory comes in frequently.

Sinus Defense


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