Multi-Probiotic Sinus Support


Multi-Probiotic Sinus Support by Douglas Laboratories is a unique formula that offers targeted sinus support.

Available on backorder

Available on February 20, 2023
SKU: 202117-90X Categories: , Tags: ,
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Multi-Probiotic Sinus Support

Multi-Probiotic Sinus Support by Douglas Laboratories is a unique formula that offers targeted sinus support. It contains four strains of probiotics and NutraFlora® scFOS® prebiotic fiber to support the immune system, combined with N-Acetyl-L-Cysteine (NAC) for its antioxidant and mucolytic properties beneficial for nasal and bronchial health, and the bioflavonoid Quercetin helps maintain respiratory support.


N-Acetyl-L-Cysteine (NAC) is a powerful, natural antioxidant that works in the sinus and nasal passages to support normal mucus viscosity and flow. NAC is efficiently transported into the cell where it is readily converted to cysteine for glutathione synthesis. Thus, supplementation with N-Acetyl-L-Cysteine can raise intracellular glutathione levels.

As such, glutathione is a powerful antioxidant to scavenge toxic free radicals and inhibit peroxidation. Quercetin a common type of flavonoid found in various plants that provides antioxidant protection against environmental stresses. In laboratory studies, quercetin supports normal histamine release, which is important for supporting sinus health.


Multi-Probiotic Sinus Support is indicated for individuals that desire a broad-spectrum sinus and immune support formula.


Serving size 1 vegetarian capsule:

  • Proprietary Blend – 280 mg (yielding 7 billion CFU)
  • N-Acetyl-L-Cysteine
  • Quercetin
  • Short Chain Fructooligosaccharides (NutraFlora® scFOS®)
  • Bifidobacterium bifidum
  • Lactobacillus acidophilus
  • Lactobacillus rhamnosus
  • Streptococcus thermophilus

Other ingredients: Hydroxypropyl methylcellulose (capsule),vegetable stearate.

Suggested Use

Take 1 capsule 3 times daily, preferably on an empty stomach, or as directed by one of our health coach professionals.

Side Effects

No adverse effects have been reported.


Store in a cool, dry place, away from direct light. After opening, refrigerate with lid tightly sealed for optimal results. Keep out of reach of children.


Douglas Laboratories

Douglas Laboratories® researches, develops and manufactures the right suite of rigorously designed, science-based, healthy aging supplements, and provides customized practice support. With a 60-year heritage of innovating and designing products to meet the needs of healthcare professionals, we push the potential of both clinical practices and patients to continually perform at their personal best, today and in the future.
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